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Contents
- The climate of San Ramon
- The best time to visit San Ramon
- The worst time to visit San Ramon
- Spring weather in San Ramon
- Summer weather in San Ramon
- Autumn weather in San Ramon
- Winter weather in San Ramon
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
The climate of San Ramon
Located in Costa Rica, San Ramon is marked by its typical tropical monsoon climate, frequently characterized under the Köppen climate classification as 'Am'. This indicates the propensity for heavy and regular downpours, accompanied by consistently high temperatures and humidity, irrespective of the time of the year.
Throughout the year, the average high temperature fluctuates slightly, reaching from 23.9°C (75°F) at the beginning of the year and peaking at 26°C (78.8°F) around April before descending to 22.4°C (72.3°F) by October and touching 23.4°C (74.1°F) by December. Concurrently, the average low temperature in San Ramon ranges from 13.8°C (56.8°F) to 17°C (62.6°F), showing a mild variation as the year progresses. Weather here is fairly humid, with relative humidity percentages peaking to 91% in September and October and dipping to 75% between February to March.
Rainfall is a regular occurrence in San Ramon. Precipitation intensifies from April, with rainfall measures reaching their maximum of 438mm (17.24") in October. The total rainfall volume reduces substantially to 65mm (2.56") by December, indicating the end of the highly visible monsoon season. Daylight hours show minimal variation, oscillating from 11.5 hours to 12.7 hours. Sunshine hours, however, cope reasonably well, despite the reduction during the rainfall season, with the minimum daylight of 5.8 hours in October.
The unique feature of San Ramon's climate is its persistent, almost identical UV index throughout the year, fixed at level 5, implying no severe risk of harm from unprotected sun exposure.
Throughout the year, the average high temperature fluctuates slightly, reaching from 23.9°C (75°F) at the beginning of the year and peaking at 26°C (78.8°F) around April before descending to 22.4°C (72.3°F) by October and touching 23.4°C (74.1°F) by December. Concurrently, the average low temperature in San Ramon ranges from 13.8°C (56.8°F) to 17°C (62.6°F), showing a mild variation as the year progresses. Weather here is fairly humid, with relative humidity percentages peaking to 91% in September and October and dipping to 75% between February to March.
Rainfall is a regular occurrence in San Ramon. Precipitation intensifies from April, with rainfall measures reaching their maximum of 438mm (17.24") in October. The total rainfall volume reduces substantially to 65mm (2.56") by December, indicating the end of the highly visible monsoon season. Daylight hours show minimal variation, oscillating from 11.5 hours to 12.7 hours. Sunshine hours, however, cope reasonably well, despite the reduction during the rainfall season, with the minimum daylight of 5.8 hours in October.
The unique feature of San Ramon's climate is its persistent, almost identical UV index throughout the year, fixed at level 5, implying no severe risk of harm from unprotected sun exposure.
The best time to visit San Ramon
Given the climate patterns, the best time to visit San Ramon is typically between January and February. During this time, the average high temperatures are comfortably warm, varying between 23.9°C (75°F) and 25°C (77°F). The average low temperatures stay between 13.8°C (56.8°F) and 14°C (57.2°F), making the nights moderately cool. Planning a visit during this window also minimizes the risk of encountering heavy rainfall, with precipitation volumes measured at 32mm (1.26") and 26mm (1.02").
The worst time to visit San Ramon
Visitors may want to avoid San Ramon during September and October. During this period, the city experiences its most severe rainfall, reaching volumes as high as 344mm (13.54") and 438mm (17.24") respectively. Additionally, these months correspond to the highest recorded relative humidity of the year at 91%, which combined with the reduced sunshine hours (reaching a low of 5.8 hours in October) may restrict outdoor activities.
Spring weather in San Ramon
Springtime in San Ramon, noted from March to May, witnesses a gradual rise in temperature, with an average high variation from 25.8°C (78.4°F) to 26°C (78.8°F) and lows fluctuating from 14.5°C (58.1°F) to 16.9°C (62.4°F). The onset of the rainfall season begins in April, with by monthly rainfall going from 28mm (1.1") in March to a significant 369mm (14.53") by May. The daylight hours are reasonably consistent, while sunshine hours begin to decrease, dropping to 6.9 hours in May.
Summer weather in San Ramon
Summer, which spans from June through August, is characterized by an average high temperature plateau of 23.3°C (73.9°F). Concurrently, the low temperature peaks to 17°C (62.6°F) and then reduces to 15.8°C (60.4°F) by August. The monsoon is in full swing, with the city receiving between 301mm (11.85") to 378mm (14.88") of rain. This time also correlates with the highest relative humidity of the year at 90%.
Autumn weather in San Ramon
During the autumn months from September to November, the high temperatures reduce slightly, averaging between 23°C (73.4°F) and 22.7°C (72.9°F), while the low temperatures are quite consistent, averaging between 16.4°C (61.5°F) and 15.2°C (59.4°F). The rainfall begins to lessen, going from 344mm (13.54") in September to 165mm (6.5") by November. Sunshine hours increase slightly, signaling the preparation for the drier months.
Winter weather in San Ramon
Winter, from December to February, is relatively dry in San Ramon. Throughout this season, the average high temperature varies from 23.4°C (74.1°F) to 25°C (77°F), while the low temperature fluctuates between 14°C (57.2°F) and 13.8°C (56.8°F). This is a relieving time for the residents, as the city receives substantially less rainfall, between 65mm (2.56") to 32mm (1.26"). The relative humidity drops to 84% in December, making it the driest month of the year.
Weather in January
Beginning the year, San Ramon, Costa Rica displays milder climate conditions. Despite temperatures being lower than in following months, they still provide a comfortable climate. The rain might greet you occasionally, however, sunshine dominates most of the days. Weather in January »
Weather in February
Transitioning into February, a slight rise in temperature is noticed. Still, the weather remains fairly constant against its predecessor. The San Ramon's sky retains its clarity with the presence of the sun for most of the days. Weather in February »
Weather in March
In terms of weather, San Ramon maintains a somewhat steady trend from January to March. The days of rainfall increase, yet the sun asserts its dominance for a reasonable duration. A small decrease in wind speed is noticed but it does not significantly affect the overall weather. Weather in March »
Weather in April
There's a striking change in San Ramon's weather by the time April arrives. With the onset of a wetter climate, umbrella becomes an essential outdoor companion. A noteworthy increment in rainfall from 28mm (1.1") in March to 100mm (3.94") heralds the rain season, although sunny hours keep warming the city. Weather in April »
Weather in May
May is characterized by visible shifts in the weather patterns of San Ramon. The modification can be seen in rising temperatures, escalating humidity and decreased hours of sunlight. Expect more grey skies and precipitation this month. Weather in May »
Weather in June
Weather in San Ramon goes through only minor changes in June. Conditions continue to remain wet, with sporadic sun appearances. A slight increase in temperature goes mostly unnoticed due to high humidity. Accumulated precipitation reaches a close second peak with 378mm (14.88") of rainfall. Weather in June »
Weather in July
July in San Ramon witnesses a continuation of the rainy season. While awaiting more sunlit days, residents still encounter regular showers. The temperature keeps a steady count with only minor fluctuations. Groundwater saturation increases due to persistent rainfall, gathering to 301mm (11.85"). Weather in July »
Weather in August
August represents a common Costa Rican weather pattern with abundant showers throughout the month. Contrastingly, the daytime temperature still maintains comfortableness which occasionally gets subdued by heavy clouds. The rainfall prevails stronger, summing up to 339mm (13.35") over the month. Weather in August »
Weather in September
September doesn't bring much change in San Ramon's weather. The city's skies remain mostly cloudy and daily rainfall keeps the sidewalks wet. Sunshine reduces, providing fewer bright hours for outdoor activities. Additionally, 344mm (13.54") of rainfall this month indicates the nearing end of the peak rain period. Weather in September »
Weather in October
October prominently carries the moist climate legacy of the previous month. San Ramon anticipates the reduction of showers and the reappearance of the sun soon. A noticeable decline in winds speeds adds to a peaceful, though damp, atmosphere. Weather in October »
Weather in November
November brings significant changes to weather conditions in San Ramon. The rain lessens in severity, and the intensity of the downpour recedes. The welcoming sun starts asserting its dominance and daylight hours increase noticeably. Weather in November »
Weather in December
For San Ramon, December marks the end of the rainy season. Reemergence of significantly longer sunlight hours brightens the holiday mood. The temperature, humidity, and pressure all maintain a steady trend as the year closes. The decrease in rainfall continues, stopping at 65mm (2.56"), bringing the year full-circle. Weather in December »
[Resources]Frequently asked questions
How many days does it rain in San Ramon?
Throughout the year, in San Ramon, there are 287.8 rainfall days, and 2585mm (101.77") of precipitation is accumulated.
What are the months with the highest UV index in San Ramon?
The months with the highest UV index are January through December, with an average maximum UV index of 5.
When is the lowest UV index in San Ramon?
January through December, with an average maximum UV index of 5, are months with the lowest UV index.
What is the least humid month in San Ramon?
The months with the lowest humidity are February and March, with an average relative humidity of 75%.
What is the driest month in San Ramon?
February is the month with the least rainfall in San Ramon, Costa Rica. Rain falls for 12.2 days and accumulates 26mm (1.02") of precipitation.
What month has the most sunshine in San Ramon?
With an average of 9.2h of sunshine, February has the most sunshine of the year.
What is the warmest month in San Ramon?
April stands out as San Ramon's warmest month, with an average high-temperature of 26°C (78.8°F) and a low-temperature of 15.9°C (60.6°F).
When are the longest days in San Ramon?
June has the longest days of the year in San Ramon, with an average of 12h and 42min of daylight.
What are the most humid months in San Ramon?
September and October, with an average relative humidity of 91%, are most humid months in San Ramon, Costa Rica.
What month is the coldest in San Ramon?
In San Ramon, the lowest temperatures are generally noted in October, averaging a high of 22.4°C (72.3°F) and a low of 16.1°C (61°F).
What is the wettest month in San Ramon?
October is the month with the most rainfall. Rain falls for 30.5 days and accumulates 438mm (17.24") of precipitation.
What is the month with the least sunshine in San Ramon?
October has the least sunshine of the year in San Ramon, with an average of 5.8h of sunshine.
What is the month with the shortest days in San Ramon?
The month with the shortest days in San Ramon, Costa Rica, is December, with an average of 11h and 30min of daylight.
Is there Daylight Saving Time (DST) in San Ramon?
San Ramon does not utilize Daylight Saving Time (DST). CST timezone is used throughout the entire year.
Average temperature
San Ramon, Costa Rica
The warmest month (with the highest average high temperature) is April (26°C).
The month with the lowest average high temperature is October (22.4°C).
The month with the highest average low temperature is June (17°C).
The coldest month (with the lowest average low temperature) is January (13.8°C).
Average pressure
San Ramon, Costa Rica
- Average pressure in January:
1012.3mbar - Average pressure in February:
1012mbar - Average pressure in March:
1012.1mbar - Average pressure in April:
1011.5mbar - Average pressure in May:
1011.2mbar - Average pressure in June:
1011.2mbar
- Average pressure in July:
1011.5mbar - Average pressure in August:
1011.3mbar - Average pressure in September:
1011.1mbar - Average pressure in October:
1010.8mbar - Average pressure in November:
1011.1mbar - Average pressure in December:
1011.7mbar
The month with the highest atmospheric pressure is January (1012.3mbar).
The month with the lowest atmospheric pressure is October (1010.8mbar).
Average wind speed
San Ramon, Costa Rica
- Average wind speed in January:
10.5km/h - Average wind speed in February:
10.7km/h - Average wind speed in March:
9.6km/h - Average wind speed in April:
7km/h - Average wind speed in May:
5.1km/h - Average wind speed in June:
5km/h
- Average wind speed in July:
6.8km/h - Average wind speed in August:
5.5km/h - Average wind speed in September:
4.3km/h - Average wind speed in October:
4.4km/h - Average wind speed in November:
6.5km/h - Average wind speed in December:
9km/h
The windiest month (with the highest average wind speed) is February (10.7km/h).
The calmest month (with the lowest average wind speed) is September (4.3km/h).
Average humidity
San Ramon, Costa Rica
The months with the highest relative humidity are September and October (91%).
The months with the lowest relative humidity are February and March (75%).
Average rainfall
San Ramon, Costa Rica
- Average rainfall in January:
32mm - Average rainfall in February:
26mm - Average rainfall in March:
28mm - Average rainfall in April:
100mm - Average rainfall in May:
369mm - Average rainfall in June:
378mm
- Average rainfall in July:
301mm - Average rainfall in August:
339mm - Average rainfall in September:
344mm - Average rainfall in October:
438mm - Average rainfall in November:
165mm - Average rainfall in December:
65mm
The wettest month (with the highest rainfall) is October (438mm).
The driest month (with the least rainfall) is February (26mm).
Average rainfall days
San Ramon, Costa Rica
- Average rainfall days in January:
14.3 days - Average rainfall days in February:
12.2 days - Average rainfall days in March:
15.5 days - Average rainfall days in April:
21.9 days - Average rainfall days in May:
28.7 days - Average rainfall days in June:
28.9 days
- Average rainfall days in July:
29.7 days - Average rainfall days in August:
29.2 days - Average rainfall days in September:
29.5 days - Average rainfall days in October:
30.5 days - Average rainfall days in November:
27.9 days - Average rainfall days in December:
19.5 days
The month with the highest number of rainy days is October (30.5 days).
The month with the least rainy days is February (12.2 days).
Average daylight / Average sunshine
San Ramon, Costa Rica
- Average daylight in January:
11h and 4min - Average daylight in February:
11h and 5min - Average daylight in March:
12h and 1min - Average daylight in April:
12h and 2min - Average daylight in May:
12h and 4min - Average daylight in June:
12h and 4min
- Average daylight in July:
12h and 4min - Average daylight in August:
12h and 2min - Average daylight in September:
12h and 1min - Average daylight in October:
11h and 5min - Average daylight in November:
11h and 4min - Average daylight in December:
11h and 3min
The month with the longest days is June (Average daylight: 12h and 42min).
The month with the shortest days is December (Average daylight: 11h and 30min).
- Average sunshine in January:
8h and 5min - Average sunshine in February:
9h and 1min - Average sunshine in March:
8h and 5min - Average sunshine in April:
8h and 4min - Average sunshine in May:
6h and 5min - Average sunshine in June:
6h and 1min
- Average sunshine in July:
7h and 1min - Average sunshine in August:
6h and 4min - Average sunshine in September:
6h and 3min - Average sunshine in October:
5h and 5min - Average sunshine in November:
6h and 2min - Average sunshine in December:
7h and 5min
The month with the most sunshine is February (Average sunshine: 9h and 12min).
The month with the least sunshine is October (Average sunshine: 5h and 48min).
Average sunshine days
San Ramon, Costa Rica
- Average sunshine days in January:
13.1 days - Average sunshine days in February:
12.7 days - Average sunshine days in March:
13.5 days - Average sunshine days in April:
6.4 days - Average sunshine days in May:
1.8 days - Average sunshine days in June:
0.5 days
- Average sunshine days in July:
0.7 days - Average sunshine days in August:
0.7 days - Average sunshine days in September:
0.1 days - Average sunshine days in October:
0.4 days - Average sunshine days in November:
1.6 days - Average sunshine days in December:
9.1 days
The month with the most sunshine days is March (13.5 days).
The month with the least sunshine days is September (0.1 days).
Average UV index
San Ramon, Costa Rica
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 5).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 5).
Average cloud cover
San Ramon, Costa Rica
The month with the most cloud cover is October (Cloud cover 68).
The month with the least cloud cover is February (Cloud cover 30).
Average visibility
San Ramon, Costa Rica
The months with the highest visibility are January, February and March (9km).
The months with the lowest visibility are August, September, October and November (6km).
San Ramon, Costa Rica
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