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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
Weather in January
January, the same as December, is another enjoyable winter month in Alta Loma, California, with an average temperature ranging between max 63.9°F (17.7°C) and min 46°F (7.8°C). On the advent of January, Alta Loma's average high-temperature exhibits a minor adjustment to a still comfortable 63.9°F (17.7°C) from December's 61.3°F (16.3°C). Weather in January »
Weather in February
February, the last month of the winter in Alta Loma, is another comfortable month, with an average temperature fluctuating between 63.9°F (17.7°C) and 45.1°F (7.3°C). Alta Loma starts February with an average high-temperature of a still enjoyable 63.9°F (17.7°C), staying steady with the temperature in January. Weather in February »
Weather in March
The first month of the spring, March, is also an enjoyable month in Alta Loma, California, with temperature in the range of an average high of 67.8°F (19.9°C) and an average low of 46.6°F (8.1°C). The beginning of March records an average high-temperature of a still refreshing 67.8°F (19.9°C), marking a negligible difference from February's 63.9°F (17.7°C). Weather in March »
Weather in April
April in Alta Loma, California, is an agreeable spring month, with an average temperature varying between 50.2°F (10.1°C) and 72.9°F (22.7°C). In April, Alta Loma experiences a minor shift in meteorological conditions with average high-temperatures marked at an agreeable 72.9°F (22.7°C), closely mirroring the climate in March. Weather in April »
Weather in May
May, the last month of the spring in Alta Loma, is a warm month, with temperature in the range of an average low of 53.2°F (11.8°C) and an average high of 76.6°F (24.8°C). The average high-temperature during May is a warm 76.6°F (24.8°C), almost matching the conditions of the preceding month. Weather in May »
Weather in June
June, the first month of the summer in Alta Loma, is still a warm month, with temperature in the range of an average low of 58.3°F (14.6°C) and an average high of 84.7°F (29.3°C). With the onset of June, the average high-temperature subtly transitions from a warm 76.6°F (24.8°C) in May to a still moderately hot 84.7°F (29.3°C). Weather in June »
Weather in July
July is a hot summer month in Alta Loma, California, with temperature in the range of an average low of 64.8°F (18.2°C) and an average high of 90.3°F (32.4°C). July introduces a marginal temperature uplift, with average high-temperatures adjusting from June's moderately hot 84.7°F (29.3°C) to a tropical 90.3°F (32.4°C). Weather in July »
Weather in August
August, the last month of the summer in Alta Loma, is another tropical month, with an average temperature ranging between min 66.7°F (19.3°C) and max 91.2°F (32.9°C). With average temperatures fluctuating between a high of 91.2°F (32.9°C) and a low of 66.7°F (19.3°C), August stands out as the warmest month. In August, the average heat index is computed to be a hot 93.2°F (34°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a hot month in Alta Loma, California, with temperature in the range of an average high of 88.3°F (31.3°C) and an average low of 63.9°F (17.7°C). The arrival of September brings an average high-temperature of a still hot 88.3°F (31.3°C), nearly identical to August's 91.2°F (32.9°C). Weather in September »
Weather in October
October, the same as September, is a moderately hot autumn month in Alta Loma, California, with an average temperature varying between 57.4°F (14.1°C) and 78.8°F (26°C). The arrival of October indicates a decrease in the average high-temperature, moving from a tropical 88.3°F (31.3°C) in September to a moderately hot 78.8°F (26°C). Weather in October »
Weather in November
The last month of the autumn, November, is also an agreeable month in Alta Loma, California, with an average temperature fluctuating between 50.9°F (10.5°C) and 70.7°F (21.5°C). November's arrival coincides with a soft drop in the average high-temperature, subtly decreasing from October's moderately hot 78.8°F (26°C) to an agreeable 70.7°F (21.5°C). Weather in November »
Weather in December
December, the first month of the winter in Alta Loma, is also an enjoyable month, with temperature in the range of an average high of 61.3°F (16.3°C) and an average low of 45.3°F (7.4°C). December, recording an average high temperature of 61.3°F (16.3°C) and a low temperature of 45.3°F (7.4°C), is Alta Loma's coldest month. Weather in December »
[Resources]Frequently asked questions
How much does it rain in Alta Loma?
Throughout the year, in Alta Loma, California, there are 50.5 rainfall days, and 7.56" (192mm) of precipitation is accumulated.
What is the most humid month in Alta Loma?
The months with the highest humidity in Alta Loma are February, March and May, with an average relative humidity of 53%.
What is the wettest month in Alta Loma?
February is the month with the most rainfall. Rain falls for 6 days and accumulates 1.73" (44mm) of precipitation.
What is the month with the least sunshine in Alta Loma?
The month with the least sunshine in Alta Loma, California, is February, with an average of 6.9h of sunshine.
When is Daylight Saving Time (DST) in Alta Loma?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Alta Loma, California, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.
What is the driest month in Alta Loma?
The month with the least rainfall is June, when the rain falls for 1.2 days and typically collects 0.04" (1mm) of precipitation.
When are the longest days in Alta Loma?
June has the longest days of the year in Alta Loma, California, with an average of 14h and 24min of daylight.
What month has the most sunshine in Alta Loma?
July has the most sunshine of the year in Alta Loma, California, with an average of 12.1h of sunshine.
What is the month with the highest UV index in Alta Loma?
July and August, with an average maximum UV index of 7, are months with the highest UV index.
What is the warmest month in Alta Loma?
Alta Loma's warmest month, August, generally records average temperatures ranging from a high of 91.2°F (32.9°C) to a low of 66.7°F (19.3°C).
What is the least humid month in Alta Loma?
The least humid month in Alta Loma is August, with an average relative humidity of 41%.
What is the coldest time of year in Alta Loma?
Temperature records mark December as the coldest month, with highs averaging 61.3°F (16.3°C) and lows at 45.3°F (7.4°C).
What is the month with the shortest days in Alta Loma?
December has the shortest days of the year, with an average of 9h and 54min of daylight.
When is the lowest UV index in Alta Loma?
The month with the lowest UV index in Alta Loma is December, with an average maximum UV index of 3.
Average temperature
Alta Loma, CA
The warmest month (with the highest average high temperature) is August (91.2°F).
The month with the lowest average high temperature is December (61.3°F).
The month with the highest average low temperature is August (66.7°F).
The coldest month (with the lowest average low temperature) is February (45.1°F).
Average pressure
Alta Loma, CA
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.04"Hg - Average pressure in March:
30.02"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.9"Hg - Average pressure in June:
29.86"Hg
- Average pressure in July:
29.89"Hg - Average pressure in August:
29.88"Hg - Average pressure in September:
29.88"Hg - Average pressure in October:
29.94"Hg - Average pressure in November:
30.03"Hg - Average pressure in December:
30.07"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed
Alta Loma, CA
- Average wind speed in January:
5.3mph - Average wind speed in February:
5.1mph - Average wind speed in March:
5.3mph - Average wind speed in April:
5.9mph - Average wind speed in May:
5.9mph - Average wind speed in June:
5.5mph
- Average wind speed in July:
5.1mph - Average wind speed in August:
4.8mph - Average wind speed in September:
4.5mph - Average wind speed in October:
4.8mph - Average wind speed in November:
5mph - Average wind speed in December:
5.2mph
The windiest months (with the highest average wind speed) are April and May (5.9mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).
Average humidity
Alta Loma, CA
The months with the highest relative humidity are February, March and May (53%).
The month with the lowest relative humidity is August (41%).
Average rainfall
Alta Loma, CA
- Average rainfall in January:
1.02" - Average rainfall in February:
1.73" - Average rainfall in March:
0.79" - Average rainfall in April:
0.71" - Average rainfall in May:
0.28" - Average rainfall in June:
0.04"
- Average rainfall in July:
0.2" - Average rainfall in August:
0.12" - Average rainfall in September:
0.12" - Average rainfall in October:
0.24" - Average rainfall in November:
0.75" - Average rainfall in December:
1.57"
The wettest month (with the highest rainfall) is February (1.73").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days
Alta Loma, CA
- Average rainfall days in January:
5.6 days - Average rainfall days in February:
6 days - Average rainfall days in March:
7.5 days - Average rainfall days in April:
5.9 days - Average rainfall days in May:
4.2 days - Average rainfall days in June:
1.2 days
- Average rainfall days in July:
3.1 days - Average rainfall days in August:
1.6 days - Average rainfall days in September:
2.3 days - Average rainfall days in October:
2.7 days - Average rainfall days in November:
4 days - Average rainfall days in December:
6.4 days
The month with the highest number of rainy days is March (7.5 days).
The month with the least rainy days is June (1.2 days).
Average daylight / Average sunshine
Alta Loma, CA
- Average daylight in January:
10h and 1min - Average daylight in February:
11h and 0min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 0min - Average daylight in June:
14h and 2min
- Average daylight in July:
14h and 1min - Average daylight in August:
13h and 2min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 2min - Average daylight in November:
10h and 2min - Average daylight in December:
9h and 5min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in January:
7h and 0min - Average sunshine in February:
6h and 5min - Average sunshine in March:
9h and 0min - Average sunshine in April:
11h and 2min - Average sunshine in May:
11h and 5min - Average sunshine in June:
12h and 0min
- Average sunshine in July:
12h and 1min - Average sunshine in August:
12h and 0min - Average sunshine in September:
10h and 4min - Average sunshine in October:
8h and 5min - Average sunshine in November:
7h and 2min - Average sunshine in December:
7h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is February (Average sunshine: 6h and 54min).
Average sunshine days
Alta Loma, CA
- Average sunshine days in January:
24.2 days - Average sunshine days in February:
21.4 days - Average sunshine days in March:
23.3 days - Average sunshine days in April:
22.9 days - Average sunshine days in May:
24.9 days - Average sunshine days in June:
27.7 days
- Average sunshine days in July:
25.1 days - Average sunshine days in August:
26.7 days - Average sunshine days in September:
25.7 days - Average sunshine days in October:
26.5 days - Average sunshine days in November:
25.6 days - Average sunshine days in December:
23.2 days
The month with the most sunshine days is June (27.7 days).
The month with the least sunshine days is February (21.4 days).
Average UV index
Alta Loma, CA
The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover
Alta Loma, CA
The months with the most cloud cover are March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 4).
Average visibility
Alta Loma, CA
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Alta Loma, California, USA
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