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Contents
- 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
Climate and monthly weather forecast
Weather in January
January in Santo Tomás La Unión, Guatemala, is a hot winter month, with an average temperature fluctuating between 30°C (86°F) and 17.7°C (63.9°F). The average high-temperature during January registers at a hot 30°C (86°F), closely corresponding to the preceding month. Weather in January »
Weather in February
February, the last month of the winter in Santo Tomás La Unión, is another hot month, with an average temperature ranging between max 30.8°C (87.4°F) and min 18.2°C (64.8°F). The average high-temperature in February, at a still tropical 30.8°C (87.4°F), reveals a modest deviation from January's 30°C (86°F). Weather in February »
Weather in March
March, the first month of the spring in Santo Tomás La Unión, is still a tropical month, with an average temperature fluctuating between 31.5°C (88.7°F) and 18.9°C (66°F). March, recognised by an average high temperature of 31.5°C (88.7°F) and a low of 18.9°C (66°F), is Santo Tomás La Unión's warmest month. The heat index in March is appraised at a sweltering 36°C (96.8°F). Weather in March »
Weather in April
April, the same as March, in Santo Tomás La Unión, Guatemala, is another tropical spring month, with temperature in the range of an average high of 31.3°C (88.3°F) and an average low of 20.2°C (68.4°F). Santo Tomás La Unión records a slight change with April's average high-temperatures adjusting to a still tropical 31.3°C (88.3°F) from March's 31.5°C (88.7°F). Weather in April »
Weather in May
May, the last month of the spring in Santo Tomás La Unión, is another tropical month, with temperature in the range of an average low of 20.5°C (68.9°F) and an average high of 30°C (86°F). May's presence records an average high-temperature of a still hot 30°C (86°F), closely mirroring April's climate. Weather in May »
Weather in June
June, the first month of the summer in Santo Tomás La Unión, is also a moderately hot month, with an average temperature varying between 29.3°C (84.7°F) and 19.9°C (67.8°F). Santo Tomás La Unión experiences an average high-temperature of a moderately hot 29.3°C (84.7°F) in June, marking an insignificant shift from 30°C (86°F) in May. Weather in June »
Weather in July
July, like June, in Santo Tomás La Unión, Guatemala, is a moderately hot summer month, with an average temperature ranging between max 29.8°C (85.6°F) and min 19.4°C (66.9°F). An average high-temperature of a still warm 29.8°C (85.6°F) marks July, exhibiting a close resemblance to the conditions in June. Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Santo Tomás La Unión, Guatemala, with temperature in the range of an average low of 19.4°C (66.9°F) and an average high of 29.5°C (85.1°F). The advent of August presents an average high-temperature of a still warm 29.5°C (85.1°F), maintaining a close correlation with the preceding month. Weather in August »
Weather in September
September, the first month of the autumn in Santo Tomás La Unión, is also a moderately hot month, with temperature in the range of an average low of 19.4°C (66.9°F) and an average high of 28.5°C (83.3°F). The coldest month is September, with an average high-temperature of 28.5°C (83.3°F) and an average low-temperature of 19.4°C (66.9°F). The heat index value for September is appraised at a tropical 33°C (91.4°F). Weather in September »
Weather in October
October, the same as September, is another warm autumn month in Santo Tomás La Unión, Guatemala, with an average temperature varying between 19.2°C (66.6°F) and 28.6°C (83.5°F). The transition into October notes an average high-temperature of a still warm 28.6°C (83.5°F), revealing a mild distinction from the 28.5°C (83.3°F) in September. Weather in October »
Weather in November
The last month of the autumn, November, is another warm month in Santo Tomás La Unión, Guatemala, with an average temperature ranging between min 18.4°C (65.1°F) and max 29.3°C (84.7°F). Santo Tomás La Unión, Guatemala, records an average high-temperature of a still moderately hot 29.3°C (84.7°F) as November arrives, nearly mirroring the previous month's climate. Weather in November »
Weather in December
The first month of the winter, December, is also a moderately hot month in Santo Tomás La Unión, Guatemala, with an average temperature varying between 17.6°C (63.7°F) and 29.5°C (85.1°F). With December's arrival, Santo Tomás La Unión's weather records an average high-temperature of a still moderately hot 29.5°C (85.1°F), marking little difference from November's 29.3°C (84.7°F). Weather in December »
Updated: Feb 15, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the least humid months in Santo Tomás La Unión?
The months with the lowest humidity in Santo Tomás La Unión are January through March, with an average relative humidity of 59%.
What is the driest month in Santo Tomás La Unión?
The months with the least rainfall are January and February Rain falls for 4.8 days and accumulates 7mm (0.28") of rain.
How much does it rain in Santo Tomás La Unión?
Throughout the year, in Santo Tomás La Unión, there are 222.8 rainfall days, and 1491mm (58.7") of precipitation is accumulated.
What are the months with the highest UV index in Santo Tomás La Unión?
January through December, with an average maximum UV index of 6, are months with the highest UV index in Santo Tomás La Unión.
What are the months with the lowest UV index in Santo Tomás La Unión?
The months with the lowest UV index in Santo Tomás La Unión, Guatemala, are January through December, with an average maximum UV index of 6.
What are the warmest months in Santo Tomás La Unión?
March, recognised by an average high temperature of 31.5°C (88.7°F) and a low of 18.9°C (66°F), is Santo Tomás La Unión's warmest month.
What is the month with the most sunshine in Santo Tomás La Unión?
The months with the most sunshine in Santo Tomás La Unión are April and July, with an average of 11.2h of sunshine.
What is the rainiest month in Santo Tomás La Unión?
May is the month with the most rainfall in Santo Tomás La Unión. Rain falls for 26.4 days and accumulates 274mm (10.79") of precipitation.
When are the longest days in Santo Tomás La Unión?
With an average of 13h and 0min of daylight, June has the longest days of the year in Santo Tomás La Unión, Guatemala.
What part of the year is the coldest in Santo Tomás La Unión?
September is the coldest month of the year in Santo Tomás La Unión, Guatemala, registering average temperatures as high as 28.5°C (83.3°F) and as low as 19.4°C (66.9°F).
What is the most humid month in Santo Tomás La Unión?
The months with the highest humidity in Santo Tomás La Unión, Guatemala, are September and October, with an average relative humidity of 79%.
What is the month with the least sunshine in Santo Tomás La Unión?
With an average of 7.4h of sunshine, November has the least sunshine of the year in Santo Tomás La Unión.
What is the month with the shortest days in Santo Tomás La Unión?
December has the shortest days of the year in Santo Tomás La Unión, Guatemala, with an average of 11h and 18min of daylight.
Is there Daylight Saving Time (DST) in Santo Tomás La Unión?
Santo Tomás La Unión, Guatemala, does not observe Daylight Saving Time (DST). CST timezone is used over the entire year.
Average temperature
Santo Tomás La Unión, Guatemala
The warmest month (with the highest average high temperature) is March (31.5°C).
The month with the lowest average high temperature is September (28.5°C).
The month with the highest average low temperature is May (20.5°C).
The coldest month (with the lowest average low temperature) is December (17.6°C).
Average pressure
Santo Tomás La Unión, Guatemala
- Average pressure in January:
1014.5mbar - Average pressure in February:
1013.9mbar - Average pressure in March:
1013.7mbar - Average pressure in April:
1012.7mbar - Average pressure in May:
1012.3mbar - Average pressure in June:
1012.6mbar
- Average pressure in July:
1013.5mbar - Average pressure in August:
1012.9mbar - Average pressure in September:
1012.4mbar - Average pressure in October:
1012.2mbar - Average pressure in November:
1013.2mbar - Average pressure in December:
1013.9mbar
The month with the highest atmospheric pressure is January (1014.5mbar).
The month with the lowest atmospheric pressure is October (1012.2mbar).
Average wind speed
Santo Tomás La Unión, Guatemala
- Average wind speed in January:
6.5km/h - Average wind speed in February:
6.4km/h - Average wind speed in March:
6.6km/h - Average wind speed in April:
5.8km/h - Average wind speed in May:
5.1km/h - Average wind speed in June:
5.2km/h
- Average wind speed in July:
6.1km/h - Average wind speed in August:
5.9km/h - Average wind speed in September:
5.2km/h - Average wind speed in October:
5.5km/h - Average wind speed in November:
6.2km/h - Average wind speed in December:
6.4km/h
The windiest month (with the highest average wind speed) is March (6.6km/h).
The calmest month (with the lowest average wind speed) is May (5.1km/h).
Average humidity
Santo Tomás La Unión, Guatemala
The months with the highest relative humidity are September and October (79%).
The months with the lowest relative humidity are January, February and March (59%).
Average rainfall
Santo Tomás La Unión, Guatemala
The wettest month (with the highest rainfall) is May (274mm).
The driest months (with the least rainfall) are January and February (7mm).
Average rainfall days
Santo Tomás La Unión, Guatemala
- Average rainfall days in January:
4.8 days - Average rainfall days in February:
4.9 days - Average rainfall days in March:
12.2 days - Average rainfall days in April:
19.6 days - Average rainfall days in May:
26.4 days - Average rainfall days in June:
26.8 days
- Average rainfall days in July:
25 days - Average rainfall days in August:
26.9 days - Average rainfall days in September:
27.5 days - Average rainfall days in October:
25.9 days - Average rainfall days in November:
15.2 days - Average rainfall days in December:
7.6 days
The month with the highest number of rainy days is September (27.5 days).
The month with the least rainy days is January (4.8 days).
Average daylight / Average sunshine
Santo Tomás La Unión, Guatemala
- Average daylight in January:
11h and 2min - Average daylight in February:
11h and 4min - Average daylight in March:
12h and 1min - Average daylight in April:
12h and 3min - Average daylight in May:
12h and 5min - Average daylight in June:
13h and 0min
- Average daylight in July:
12h and 5min - Average daylight in August:
12h and 4min - Average daylight in September:
12h and 1min - Average daylight in October:
11h and 5min - Average daylight in November:
11h and 3min - Average daylight in December:
11h and 2min
The month with the longest days is June (Average daylight: 13h and 0min).
The month with the shortest days is December (Average daylight: 11h and 18min).
- Average sunshine in January:
8h and 1min - Average sunshine in February:
9h and 5min - Average sunshine in March:
9h and 3min - Average sunshine in April:
11h and 1min - Average sunshine in May:
10h and 5min - Average sunshine in June:
10h and 3min
- Average sunshine in July:
11h and 1min - Average sunshine in August:
11h and 1min - Average sunshine in September:
10h and 2min - Average sunshine in October:
8h and 2min - Average sunshine in November:
7h and 2min - Average sunshine in December:
7h and 3min
The months with the most sunshine are April and July (Average sunshine: 11h and 12min).
The month with the least sunshine is November (Average sunshine: 7h and 24min).
Average sunshine days
Santo Tomás La Unión, Guatemala
- Average sunshine days in January:
24.4 days - Average sunshine days in February:
22 days - Average sunshine days in March:
16.3 days - Average sunshine days in April:
6.8 days - Average sunshine days in May:
2.9 days - Average sunshine days in June:
2 days
- Average sunshine days in July:
4.5 days - Average sunshine days in August:
1.9 days - Average sunshine days in September:
1.5 days - Average sunshine days in October:
3.5 days - Average sunshine days in November:
12 days - Average sunshine days in December:
21.5 days
The month with the most sunshine days is January (24.4 days).
The month with the least sunshine days is September (1.5 days).
Average UV index
Santo Tomás La Unión, Guatemala
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 6).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 6).
Average cloud cover
Santo Tomás La Unión, Guatemala
The month with the most cloud cover is June (Cloud cover 38).
The month with the least cloud cover is January (Cloud cover 12).
Average visibility
Santo Tomás La Unión, Guatemala
The months with the highest visibility are January, February, March, April and December (10km).
The months with the lowest visibility are May, June, July, August, September, October and November (9km).
