Climate and monthly weather forecastMount Wilson, CA
Climate and monthly weather forecast
Weather in January
January is a refreshing winter month in Mount Wilson, California, with an average temperature varying between 44.2°F (6.8°C) and 61°F (16.1°C). The onset of January notes an average high-temperature of a still refreshing 61°F (16.1°C), subtly shifted from December's 58.5°F (14.7°C). Weather in January »Weather in February
February, the last month of the winter in Mount Wilson, is another comfortable month, with temperature in the range of an average high of 60.8°F (16°C) and an average low of 43.7°F (6.5°C). The transition into February shows a subtle variation to a still enjoyable 60.8°F (16°C) from January's 61°F (16.1°C) in the average high-temperature. Weather in February »Weather in March
The first month of the spring, March, is still a refreshing month in Mount Wilson, California, with an average temperature varying between 45.1°F (7.3°C) and 64.6°F (18.1°C). The beginning of March reveals an average high-temperature of a still enjoyable 64.6°F (18.1°C), showing minimal deviation from the previous month. Weather in March »Weather in April
April in Mount Wilson, California, is a pleasant spring month, with an average temperature ranging between max 68.9°F (20.5°C) and min 47.8°F (8.8°C). The arrival of April marks a slight shift to an average high-temperature of an agreeable 68.9°F (20.5°C) from March's 64.6°F (18.1°C). Weather in April »Weather in May
May, the last month of the spring in Mount Wilson, is another pleasant month, with an average temperature ranging between min 51.8°F (11°C) and max 72.7°F (22.6°C). Mount Wilson starts May with an average high-temperature of a still agreeable 72.7°F (22.6°C), hinting at a minimal fluctuation from April. Weather in May »Weather in June
The first month of the summer, June, is a warm month in Mount Wilson, California, with an average temperature fluctuating between 57°F (13.9°C) and 79.5°F (26.4°C). As Mount Wilson, California, transitions into June, the average high-temperature is observed to slightly rise from a pleasant 72.7°F (22.6°C) in May to a moderately hot 79.5°F (26.4°C). Weather in June »Weather in July
July, like June, in Mount Wilson, California, is a moderately hot summer month, with an average temperature varying between 85.1°F (29.5°C) and 63.1°F (17.3°C). Entering July, Mount Wilson notices a subtle temperature elevation, with the average high-temperature advancing from June's warm 79.5°F (26.4°C) to a still moderately hot 85.1°F (29.5°C). Weather in July »Weather in August
The last month of the summer, August, is a tropical month in Mount Wilson, California, with temperature in the range of an average high of 86.2°F (30.1°C) and an average low of 64°F (17.8°C). August is the warmest month, with an average high-temperature of 86.2°F (30.1°C) and an average low-temperature of 64°F (17.8°C). The heat index for August is computed to be a tropical 86°F (30°C). Weather in August »Weather in September
September, the first month of the autumn in Mount Wilson, is still a warm month, with an average temperature ranging between max 83.8°F (28.8°C) and min 61.9°F (16.6°C). With the transition into September, Mount Wilson notes an average high-temperature of a warm 83.8°F (28.8°C), closely resembling August. Weather in September »Weather in October
October, the same as September, is a moderately hot autumn month in Mount Wilson, California, with an average temperature varying between 74.3°F (23.5°C) and 55.6°F (13.1°C). A subtle decrease in the average high-temperature marks October, falling from September's warm 83.8°F (28.8°C) to a still moderately hot 74.3°F (23.5°C). Weather in October »Weather in November
November, the last month of the autumn in Mount Wilson, is another refreshing month, with an average temperature fluctuating between 50.2°F (10.1°C) and 67.1°F (19.5°C). The advent of November brings a subtle shift in temperature, with the average high moving from a warm 74.3°F (23.5°C) in October to an enjoyable 67.1°F (19.5°C). Weather in November »Weather in December
The first month of the winter, December, is also a moderate month in Mount Wilson, California, with temperature in the range of an average low of 43.3°F (6.3°C) and an average high of 58.5°F (14.7°C). December, marked by an average high-temperature of 58.5°F (14.7°C) and a low-temperature of 43.3°F (6.3°C), is the coldest month. Weather in December »Updated: Aug 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
In Mount Wilson, during the entire year, the rain falls for 50.3 days and collects up to 8.7" (221mm) of precipitation.
January through April, November and December are months with snowfall.
Throughout the year, there are 3.5 snowfall days, and 7.32" (186mm) of snow is accumulated.
The months with the least sunshine are January, February and December, with an average of 6.9h of sunshine.
February is the month with the most rainfall. Rain falls for 5.3 days and accumulates 1.73" (44mm) of precipitation.
March is the most humid month, with an average relative humidity of 56%.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Mount Wilson, 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.
In Mount Wilson, snow does not fall in May through October.
June is the month with the least rainfall. Rain falls for 1.3 days and accumulates 0.08" (2mm) of precipitation.
With an average of 14h and 24min of daylight, June has the longest days of the year.
The months with the highest UV index are June through September, with an average maximum UV index of 6.
The month with the most sunshine is July, with an average of 12.1h of sunshine.
The warmest temperatures occur during August, when averages reach a peak of 86.2°F (30.1°C) and a low of 64°F (17.8°C).
August is the least humid month, with an average relative humidity of 45%.
November and December, with an average maximum UV index of 3, are months with the lowest UV index.
The month of December sees the average lowest temperatures, reaching 58.5°F (14.7°C) at the peak and 43.3°F (6.3°C) at the low.
December is the month with the most snowfall. Snow falls for 0.5 days and accumulates 2.99" (76mm) of snow.
December has the shortest days of the year, with an average of 9h and 54min of daylight.
Average temperature
Mount Wilson, CA
The warmest month (with the highest average high temperature) is August (86.2°F).
The month with the lowest average high temperature is December (58.5°F).
The month with the highest average low temperature is August (64°F).
The coldest month (with the lowest average low temperature) is December (43.3°F).
Average pressure
Mount Wilson, CA
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.05"Hg - Average pressure in March:
30.03"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.92"Hg - Average pressure in June:
29.88"Hg
- Average pressure in July:
29.91"Hg - Average pressure in August:
29.89"Hg - Average pressure in September:
29.89"Hg - Average pressure in October:
29.95"Hg - Average pressure in November:
30.03"Hg - Average pressure in December:
30.08"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed
Mount Wilson, CA
- Average wind speed in January:
5.8mph - Average wind speed in February:
5.4mph - Average wind speed in March:
5.5mph - Average wind speed in April:
6mph - Average wind speed in May:
5.9mph - Average wind speed in June:
5.4mph
- 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:
5mph - Average wind speed in November:
5.4mph - Average wind speed in December:
5.7mph
The windiest month (with the highest average wind speed) is April (6mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).
Average humidity
Mount Wilson, CA
The month with the highest relative humidity is March (56%).
The month with the lowest relative humidity is August (45%).
Average rainfall
Mount Wilson, CA
- Average rainfall in January:
1.42" - Average rainfall in February:
1.73" - Average rainfall in March:
1.02" - Average rainfall in April:
0.63" - Average rainfall in May:
0.24" - Average rainfall in June:
0.08"
The wettest month (with the highest rainfall) is February (1.73").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days
Mount Wilson, CA
- Average rainfall days in January:
5.3 days - Average rainfall days in February:
5.3 days - Average rainfall days in March:
6.4 days - Average rainfall days in April:
5.2 days - Average rainfall days in May:
3.2 days - Average rainfall days in June:
1.3 days
- Average rainfall days in July:
4.5 days - Average rainfall days in August:
2.8 days - Average rainfall days in September:
3.4 days - Average rainfall days in October:
3.2 days - Average rainfall days in November:
3.9 days - Average rainfall days in December:
5.8 days
The month with the highest number of rainy days is March (6.4 days).
The month with the least rainy days is June (1.3 days).
Average snowfall
Mount Wilson, CA
The month with the highest snowfall is December (2.99").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Mount Wilson, CA
- Average snowfall days in January:
0.5 days - Average snowfall days in February:
1.3 days - Average snowfall days in March:
0.5 days - Average snowfall days in April:
0.4 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.3 days - Average snowfall days in December:
0.5 days
The month with the highest number of snowfall days is February (1.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Mount Wilson, CA
- Average daylight in January:
10h and 12min - Average daylight in February:
11h and 0min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 6min - Average daylight in May:
14h and 0min - Average daylight in June:
14h and 24min
- Average daylight in July:
14h and 12min - Average daylight in August:
13h and 24min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 18min - Average daylight in November:
10h and 24min - Average daylight in December:
9h and 54min
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 54min - Average sunshine in February:
6h and 54min - Average sunshine in March:
8h and 54min - Average sunshine in April:
11h and 24min - Average sunshine in May:
11h and 42min - Average sunshine in June:
12h and 0min
- Average sunshine in July:
12h and 6min - Average sunshine in August:
12h and 0min - Average sunshine in September:
10h and 48min - Average sunshine in October:
8h and 36min - Average sunshine in November:
7h and 18min - Average sunshine in December:
6h and 54min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 54min).
Average sunshine days
Mount Wilson, CA
- Average sunshine days in January:
25.1 days - Average sunshine days in February:
21.4 days - Average sunshine days in March:
24.2 days - Average sunshine days in April:
24.3 days - Average sunshine days in May:
26.5 days - Average sunshine days in June:
27.9 days
- Average sunshine days in July:
24.2 days - Average sunshine days in August:
26.2 days - Average sunshine days in September:
25.6 days - Average sunshine days in October:
26.5 days - Average sunshine days in November:
25.5 days - Average sunshine days in December:
23.7 days
The month with the most sunshine days is June (27.9 days).
The month with the least sunshine days is February (21.4 days).
Average UV index
Mount Wilson, 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 November and December (UV index 3).
Average cloud cover
Mount Wilson, 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 5).
Average visibility
Mount Wilson, 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).
