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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, like December, in Westmont, California, is another refreshing winter month, with an average temperature fluctuating between 52.3°F (11.3°C) and 65.1°F (18.4°C). The transition from December to January sees average high-temperatures adjusting to a still comfortable 65.1°F (18.4°C), from a not significantly different 64°F (17.8°C). Weather in January »
Weather in February
February, the last month of the winter in Westmont, is also an enjoyable month, with an average temperature fluctuating between 51.1°F (10.6°C) and 64.9°F (18.3°C). Westmont experiences an average high-temperature of a still comfortable 64.9°F (18.3°C) with the onset of February, subtly varied from January's 65.1°F (18.4°C). Weather in February »
Weather in March
The first month of the spring, March, is still a refreshing month in Westmont, California, with an average temperature ranging between max 66.6°F (19.2°C) and min 52.7°F (11.5°C). Stepping into March, Westmont records an average high-temperature of a still enjoyable 66.6°F (19.2°C), almost consistent with February. Weather in March »
Weather in April
April in Westmont, California, is a pleasant spring month, with an average temperature varying between 54.5°F (12.5°C) and 68.9°F (20.5°C). Westmont's average high-temperature in April is an agreeable 68.9°F (20.5°C), marking an insignificant difference from the 66.6°F (19.2°C) of March. Weather in April »
Weather in May
The last month of the spring, May, is also an agreeable month in Westmont, California, with an average temperature varying between 70.3°F (21.3°C) and 56.8°F (13.8°C). May commences with an average high-temperature of a still pleasant 70.3°F (21.3°C), showing little deviation from April's 68.9°F (20.5°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Westmont, California, with temperature in the range of an average low of 59.4°F (15.2°C) and an average high of 73.4°F (23°C). June notes an average high-temperature of a warm 73.4°F (23°C), subtly differing from May's 70.3°F (21.3°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Westmont, California, with an average temperature fluctuating between 63.3°F (17.4°C) and 78.3°F (25.7°C). Westmont, California, ushers in July with an average high-temperature of a still moderately hot 78.3°F (25.7°C), showing a close resemblance to the previous month. Weather in July »
Weather in August
August, the last month of the summer in Westmont, is also a moderately hot month, with temperature in the range of an average low of 64.9°F (18.3°C) and an average high of 80.2°F (26.8°C). Westmont's warmest month, August, registers temperatures that range from a high of 80.2°F (26.8°C) to a low of 64.9°F (18.3°C). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Westmont, California, with an average temperature varying between 64.2°F (17.9°C) and 79.7°F (26.5°C). As Westmont steps into September, the average high-temperature is measured at a still warm 79.7°F (26.5°C), displaying minor differences from August's 80.2°F (26.8°C). Weather in September »
Weather in October
October, the same as September, is another warm autumn month in Westmont, California, with temperature in the range of an average low of 61.9°F (16.6°C) and an average high of 75.7°F (24.3°C). Westmont commences October with an average high-temperature of a still moderately hot 75.7°F (24.3°C), maintaining a close resemblance to the previous month. Weather in October »
Weather in November
November, the last month of the autumn in Westmont, is also an agreeable month, with temperature in the range of an average high of 70.2°F (21.2°C) and an average low of 57.2°F (14°C). The arrival of November correlates with a minor temperature reduction, down from October's warm 75.7°F (24.3°C) to a pleasant 70.2°F (21.2°C). Weather in November »
Weather in December
The first month of the winter, December, is still a refreshing month in Westmont, California, with an average temperature varying between 64°F (17.8°C) and 51.4°F (10.8°C). The month of December, characterized by an average high of 64°F (17.8°C) and a low of 51.4°F (10.8°C), is recognized as the coldest. Weather in December »
Frequently asked questions
What is the wettest month in Westmont?
January is the month with the most rainfall in Westmont. Rain falls for 4.3 days and accumulates 1.42" (36mm) of precipitation.
How much does it rain in Westmont?
In Westmont, California, during the entire year, the rain falls for 47.6 days and collects up to 7.24" (184mm) of precipitation.
What is the month with the lowest UV index in Westmont?
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 4.
When is Daylight Saving Time (DST) in Westmont?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, 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 most humid month in Westmont?
With an average relative humidity of 70%, June is the most humid month in Westmont.
What is the driest month in Westmont?
The month with the least rainfall is June, when the rain falls for 1.7 days and typically collects 0.08" (2mm) of precipitation.
When are the longest days in Westmont?
The month with the longest days is June, with an average of 14h and 24min of daylight.
What are the months with the highest UV index in Westmont?
The months with the highest UV index in Westmont, California, are June through September, with an average maximum UV index of 6.
What are the months with the most sunshine in Westmont?
The months with the most sunshine are July and August, with an average of 11.9h of sunshine.
What are the warmest months in Westmont?
August, with its average high-temperature of 80.2°F (26.8°C) and an average low-temperature of 64.9°F (18.3°C), holds the record as the warmest month in Westmont.
What is the least humid month in Westmont?
The least humid month is November, with an average relative humidity of 54%.
What are the coldest months in Westmont?
December is the month when Westmont sees the average lowest temperatures, with a high of 64°F (17.8°C) and a low of 51.4°F (10.8°C).
What is the month with the shortest days in Westmont?
The month with the shortest days is December, with an average of 9h and 54min of daylight.
What is the month with the least sunshine in Westmont?
The month with the least sunshine is December, with an average of 6.7h of sunshine.
Average temperature
Westmont, CA
The warmest month (with the highest average high temperature) is August (80.2°F).
The month with the lowest average high temperature is December (64°F).
The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is February (51.1°F).
Average pressure
Westmont, CA
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.05"Hg - Average pressure in March:
30.03"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
29.93"Hg - Average pressure in June:
29.89"Hg
- Average pressure in July:
29.92"Hg - Average pressure in August:
29.9"Hg - Average pressure in September:
29.9"Hg - Average pressure in October:
29.95"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 (29.89"Hg).
Average wind speed
Westmont, CA
- Average wind speed in January:
5.5mph - Average wind speed in February:
5.6mph - Average wind speed in March:
5.9mph - Average wind speed in April:
6.4mph - Average wind speed in May:
6mph - Average wind speed in June:
5.4mph
- Average wind speed in July:
5.2mph - Average wind speed in August:
5mph - Average wind speed in September:
4.9mph - Average wind speed in October:
5mph - Average wind speed in November:
5.3mph - Average wind speed in December:
5.5mph
The windiest month (with the highest average wind speed) is April (6.4mph).
The calmest month (with the lowest average wind speed) is September (4.9mph).
Average humidity
Westmont, CA
The month with the highest relative humidity is June (70%).
The month with the lowest relative humidity is November (54%).
Average rainfall
Westmont, CA
- Average rainfall in January:
1.42" - Average rainfall in February:
1.3" - Average rainfall in March:
1.02" - Average rainfall in April:
0.39" - Average rainfall in May:
0.24" - Average rainfall in June:
0.08"
- Average rainfall in July:
0.28" - Average rainfall in August:
0.16" - Average rainfall in September:
0.24" - Average rainfall in October:
0.24" - Average rainfall in November:
0.59" - Average rainfall in December:
1.3"
The wettest month (with the highest rainfall) is January (1.42").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days
Westmont, CA
- Average rainfall days in January:
4.3 days - Average rainfall days in February:
5 days - Average rainfall days in March:
6.5 days - Average rainfall days in April:
4.5 days - Average rainfall days in May:
4.4 days - Average rainfall days in June:
1.7 days
- Average rainfall days in July:
3.4 days - Average rainfall days in August:
2.5 days - Average rainfall days in September:
3.2 days - Average rainfall days in October:
3.4 days - Average rainfall days in November:
3.7 days - Average rainfall days in December:
5 days
The month with the highest number of rainy days is March (6.5 days).
The month with the least rainy days is June (1.7 days).
Average daylight / Average sunshine
Westmont, 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:
13h and 5min - 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:
6h and 5min - Average sunshine in February:
6h and 5min - Average sunshine in March:
8h and 5min - Average sunshine in April:
10h and 5min - Average sunshine in May:
11h and 1min - Average sunshine in June:
11h and 4min
- Average sunshine in July:
11h and 5min - Average sunshine in August:
11h and 5min - Average sunshine in September:
10h and 3min - Average sunshine in October:
8h and 2min - Average sunshine in November:
7h and 1min - Average sunshine in December:
6h and 4min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days
Westmont, CA
- Average sunshine days in January:
25.3 days - Average sunshine days in February:
21.6 days - Average sunshine days in March:
24.1 days - Average sunshine days in April:
24.1 days - Average sunshine days in May:
23.6 days - Average sunshine days in June:
21.4 days
- Average sunshine days in July:
23.9 days - Average sunshine days in August:
25.4 days - Average sunshine days in September:
23.4 days - Average sunshine days in October:
25.5 days - Average sunshine days in November:
25.1 days - Average sunshine days in December:
24.8 days
The month with the most sunshine days is October (25.5 days).
The month with the least sunshine days is June (21.4 days).
Average UV index
Westmont, CA
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover
Westmont, CA
The months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 7).
Average visibility
Westmont, 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).
Westmont, California, USA
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