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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
The Simi Valley city in California, with a view of the scenic Rocky Peak and hilly ranges
Weather in January
January in Simi Valley, California, is a comfortable winter month, with temperature in the range of an average low of 47.3°F (8.5°C) and an average high of 61.3°F (16.3°C). January's arrival brings an average high-temperature of an enjoyable 61.3°F (16.3°C), slightly deviating from December's 60.1°F (15.6°C). Weather in January »
Weather in February
February, the last month of the winter in Simi Valley, is another refreshing month, with an average temperature ranging between max 60.6°F (15.9°C) and min 46.6°F (8.1°C). In Simi Valley, February's average high-temperature stands at a still refreshing 60.6°F (15.9°C), closely related to the preceding month. Weather in February »
Weather in March
The first month of the spring, March, is a comfortable month in Simi Valley, California, with an average temperature fluctuating between 47.8°F (8.8°C) and 63.3°F (17.4°C). With the advent of March, Simi Valley experiences an average high-temperature of a still refreshing 63.3°F (17.4°C), mirroring a close resemblance to the previous month. Weather in March »
Weather in April
April, the same as March, is another comfortable spring month in Simi Valley, California, with an average temperature ranging between max 66.7°F (19.3°C) and min 50.4°F (10.2°C). Simi Valley, California, registers an average high-temperature of a still enjoyable 66.7°F (19.3°C) with the arrival of April, showing minor deviation from the preceding month. Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in Simi Valley, California, with an average temperature varying between 53.4°F (11.9°C) and 70.2°F (21.2°C). The commencement of May notes an average high-temperature of a pleasant 70.2°F (21.2°C), exhibiting little difference from the previous month. Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Simi Valley, California, with an average temperature fluctuating between 75.6°F (24.2°C) and 57.7°F (14.3°C). June's arrival brings a modest temperature shift, moving from a pleasant 70.2°F (21.2°C) in May to a moderately hot 75.6°F (24.2°C). Weather in June »
Weather in July
July, like June, in Simi Valley, California, is another warm summer month, with temperature in the range of an average high of 80.8°F (27.1°C) and an average low of 61.9°F (16.6°C). July's advent notes a subtle adjustment in average high-temperature to a still moderately hot 80.8°F (27.1°C) from June. Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Simi Valley, California, with temperature in the range of an average low of 63.1°F (17.3°C) and an average high of 82.2°F (27.9°C). August is the warmest month, with the temperature often reaching an average high of 82.2°F (27.9°C) and an average low of 63.1°F (17.3°C). The heat index value for August is calculated to be 84.2°F (29°C). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Simi Valley, California, with temperature in the range of an average low of 62.1°F (16.7°C) and an average high of 79.7°F (26.5°C). Simi Valley's shift from August to September is accompanied by an average high-temperature of a still moderately hot 79.7°F (26.5°C), a slight deviation from 82.2°F (27.9°C). Weather in September »
Weather in October
October, like September, in Simi Valley, California, is another warm autumn month, with an average temperature fluctuating between 57.6°F (14.2°C) and 74.1°F (23.4°C). October signifies a minor drop in average high-temperature, transitioning from a warm 79.7°F (26.5°C) in September to a still moderately hot 74.1°F (23.4°C). Weather in October »
Weather in November
November, the last month of the autumn in Simi Valley, is another refreshing month, with temperature in the range of an average low of 51.8°F (11°C) and an average high of 67.5°F (19.7°C). A mild drop in Simi Valley's average high-temperature is observed in November, transitioning from a moderately hot 74.1°F (23.4°C) in October to a refreshing 67.5°F (19.7°C). Weather in November »
Weather in December
The first month of the winter, December, is also a moderate month in Simi Valley, California, with an average temperature ranging between min 46.4°F (8°C) and max 60.1°F (15.6°C). December is the coldest month, with an average high-temperature of 60.1°F (15.6°C) and an average low-temperature of 46.4°F (8°C). Weather in December »
Updated: Jul 2, 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
How many days does it rain?
In Simi Valley, during the entire year, the rain falls for 53.7 days and collects up to 9.61" (244mm) of precipitation.
What is the month with the least sunshine?
January, February and December, with an average of 6.8h of sunshine, are months with the least sunshine.
What is the rainiest month?
The month with the most rainfall is February, when the rain falls for 5.8 days and typically aggregates up to 1.93" (49mm) of precipitation.
When is Daylight Saving Time (DST)?
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?
The most humid month is June, with an average relative humidity of 62%.
What is the driest month?
June is the month with the least rainfall. Rain falls for 1.5 days and accumulates 0.08" (2mm) of precipitation.
When are the longest days?
The month with the longest days is June, with an average of 14h and 24min of daylight.
What is the month with the most sunshine?
June and July, with an average of 12.1h of sunshine, are months with the most sunshine.
What is the month with the highest UV index?
The months with the highest UV index are June through August, with an average maximum UV index of 6.
What time of the year is the hottest?
August temperatures tend to peak at an average high of 82.2°F (27.9°C) and dip to a low of 63.1°F (17.3°C).
What is the least humid month?
The least humid month is November, with an average relative humidity of 50%.
What are the coldest months in Simi Valley?
December is the month when Simi Valley sees the average lowest temperatures, with a high of 60.1°F (15.6°C) and a low of 46.4°F (8°C).
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 54min of daylight.
When is the lowest UV index?
The month with the lowest UV index is December, with an average maximum UV index of 3.
Average temperature
Simi Valley, CA
The warmest month (with the highest average high temperature) is August (82.2°F).
The month with the lowest average high temperature is December (60.1°F).
The month with the highest average low temperature is August (63.1°F).
The coldest month (with the lowest average low temperature) is December (46.4°F).
Average pressure
Simi Valley, CA
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.06"Hg - Average pressure in March:
30.04"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
29.94"Hg - Average pressure in June:
29.9"Hg
- Average pressure in July:
29.92"Hg - Average pressure in August:
29.91"Hg - Average pressure in September:
29.9"Hg - Average pressure in October:
29.96"Hg - Average pressure in November:
30.04"Hg - Average pressure in December:
30.08"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are June and September (29.9"Hg).
Average wind speed
Simi Valley, CA
- Average wind speed in January:
6.4mph - Average wind speed in February:
6.2mph - Average wind speed in March:
6mph - Average wind speed in April:
6.2mph - Average wind speed in May:
5.5mph - Average wind speed in June:
4.8mph
- Average wind speed in July:
4.6mph - Average wind speed in August:
4.3mph - Average wind speed in September:
4.5mph - Average wind speed in October:
5.5mph - Average wind speed in November:
6.1mph - Average wind speed in December:
6.5mph
The windiest month (with the highest average wind speed) is December (6.5mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity
Simi Valley, CA
The month with the highest relative humidity is June (62%).
The month with the lowest relative humidity is November (50%).
Average rainfall
Simi Valley, CA
- Average rainfall in January:
1.89" - Average rainfall in February:
1.93" - Average rainfall in March:
1.5" - Average rainfall in April:
0.63" - Average rainfall in May:
0.35" - Average rainfall in June:
0.08"
- Average rainfall in July:
0.24" - Average rainfall in August:
0.12" - Average rainfall in September:
0.2" - Average rainfall in October:
0.31" - Average rainfall in November:
0.67" - Average rainfall in December:
1.69"
The wettest month (with the highest rainfall) is February (1.93").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days
Simi Valley, CA
- Average rainfall days in January:
5.6 days - Average rainfall days in February:
5.8 days - Average rainfall days in March:
8 days - Average rainfall days in April:
6.2 days - Average rainfall days in May:
4.5 days - Average rainfall days in June:
1.5 days
- Average rainfall days in July:
3.7 days - Average rainfall days in August:
1.5 days - Average rainfall days in September:
2.7 days - Average rainfall days in October:
3.5 days - Average rainfall days in November:
4.3 days - Average rainfall days in December:
6.4 days
The month with the highest number of rainy days is March (8 days).
The months with the least rainy days are June and August (1.5 days).
Average daylight / Average sunshine
Simi Valley, 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:
6h and 5min - Average sunshine in February:
6h and 5min - Average sunshine in March:
8h and 5min - Average sunshine in April:
11h and 0min - Average sunshine in May:
11h and 3min - Average sunshine in June:
12h and 1min
- Average sunshine in July:
12h and 1min - Average sunshine in August:
12h and 0min - Average sunshine in September:
10h and 5min - Average sunshine in October:
8h and 2min - Average sunshine in November:
7h and 2min - Average sunshine in December:
6h and 5min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 48min).
Average sunshine days
Simi Valley, CA
- Average sunshine days in January:
23.9 days - Average sunshine days in February:
20.9 days - Average sunshine days in March:
21.5 days - Average sunshine days in April:
22.9 days - Average sunshine days in May:
23.2 days - Average sunshine days in June:
23.8 days
- Average sunshine days in July:
23.3 days - Average sunshine days in August:
25.4 days - Average sunshine days in September:
23.5 days - Average sunshine days in October:
25.3 days - Average sunshine days in November:
24.3 days - Average sunshine days in December:
23.2 days
The month with the most sunshine days is August (25.4 days).
The month with the least sunshine days is February (20.9 days).
Average UV index
Simi Valley, CA
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 3).
Average cloud cover
Simi Valley, CA
The month with the most cloud cover is March (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility
Simi Valley, 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).
Simi Valley, California, USA
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