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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 snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, in Grass Valley, California, is another fresh winter month, with an average temperature ranging between min 38.3°F (3.5°C) and max 53.8°F (12.1°C). The start of January marks an average high-temperature of a still fresh 53.8°F (12.1°C), hardly distinguishable from the conditions in December. Weather in January »
Weather in February
The last month of the winter, February, is also a fresh month in Grass Valley, California, with an average temperature ranging between max 54.5°F (12.5°C) and min 37.8°F (3.2°C). February brings an average high-temperature of a still fresh 54.5°F (12.5°C), nearly identical to the preceding month. Weather in February »
Weather in March
The first month of the spring, March, is a refreshing month in Grass Valley, California, with an average temperature varying between 39.9°F (4.4°C) and 56.5°F (13.6°C). The onset of March brings with it an average high-temperature of a mild 56.5°F (13.6°C), showing a negligible variation from the month before. Weather in March »
Weather in April
April is a refreshing spring month in Grass Valley, California, with an average temperature ranging between min 43.3°F (6.3°C) and max 63.1°F (17.3°C). Grass Valley's April weather indicates a minor increase in high-temperatures, edging from March's moderate 56.5°F (13.6°C) to a comfortable 63.1°F (17.3°C). Weather in April »
Weather in May
May, the last month of the spring in Grass Valley, is an agreeable month, with an average temperature ranging between max 71.2°F (21.8°C) and min 48.4°F (9.1°C). May introduces a marginal temperature uplift, with average high-temperatures adjusting from April's enjoyable 63.1°F (17.3°C) to an agreeable 71.2°F (21.8°C). Weather in May »
Weather in June
June, the first month of the summer in Grass Valley, is a moderately hot month, with an average temperature ranging between min 55.9°F (13.3°C) and max 82°F (27.8°C). June brings an increase in the average high-temperature, progressing from a pleasant 71.2°F (21.8°C) in May to a moderately hot 82°F (27.8°C). Weather in June »
Weather in July
July is a hot summer month in Grass Valley, California, with an average temperature varying between 60.1°F (15.6°C) and 90.1°F (32.3°C). July is the warmest month of the year, registering average temperatures as high as 90.1°F (32.3°C) and as low as 60.1°F (15.6°C). Weather in July »
Weather in August
August, the last month of the summer in Grass Valley, is another tropical month, with an average temperature varying between 89.2°F (31.8°C) and 59.2°F (15.1°C). The ushering in of August brings an average high-temperature of a still tropical 89.2°F (31.8°C), closely mirroring the 90.1°F (32.3°C) of July. Weather in August »
Weather in September
September, the first month of the autumn in Grass Valley, is also a moderately hot month, with temperature in the range of an average high of 83.8°F (28.8°C) and an average low of 56.5°F (13.6°C). September reveals a small adjustment in temperature, transitioning from an average high of a hot 89.2°F (31.8°C) in August to a moderately hot 83.8°F (28.8°C). Weather in September »
Weather in October
October, like September, is an agreeable autumn month in Grass Valley, California, with an average temperature varying between 50.7°F (10.4°C) and 72°F (22.2°C). October weather is marked by a drop in the average high-temperature, falling from a warm 83.8°F (28.8°C) in September to a pleasant 72°F (22.2°C). Weather in October »
Weather in November
November, the last month of the autumn in Grass Valley, is another refreshing month, with an average temperature ranging between max 59.5°F (15.3°C) and min 42.8°F (6°C). The commencement of November involves a temperature shift, with the average high-temperature dropping from an agreeable 72°F (22.2°C) in October to a moderate 59.5°F (15.3°C). Weather in November »
Weather in December
The first month of the winter, December, is also a fresh month in Grass Valley, California, with an average temperature fluctuating between 37.2°F (2.9°C) and 51.3°F (10.7°C). December is the coldest month, with the temperature often reaching an average high of 51.3°F (10.7°C) and an average low of 37.2°F (2.9°C). Weather in December »
Updated: Feb 9, 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 much does it rain in Grass Valley?
In Grass Valley, California, during the entire year, the rain falls for 82 days and collects up to 33.11" (841mm) of precipitation.
When does it snow in Grass Valley?
January through May, November and December are months with snowfall in Grass Valley.
How many days does it snow in Grass Valley?
In Grass Valley, during the entire year, snow falls for 6.8 days and aggregates up to 14.41" (366mm) of snow.
What is the month with the least sunshine in Grass Valley?
The month with the least sunshine in Grass Valley is January, with an average of 5.7h of sunshine.
When does it snow the most in Grass Valley?
The month with the most snowfall in Grass Valley is February, when snow falls for 2.2 days and typically aggregates up to 6.42" (163mm) of snow.
What is the most humid month in Grass Valley?
March is the most humid month in Grass Valley, California, with an average relative humidity of 75%.
What is the wettest month in Grass Valley?
March is the month with the most rainfall in Grass Valley, California. Rain falls for 15.1 days and accumulates 6.57" (167mm) of precipitation.
When is Daylight Saving Time (DST) in Grass Valley?
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.
When it does not snow in Grass Valley?
In Grass Valley, snow does not fall in June through October.
When are the longest days in Grass Valley?
June has the longest days of the year in Grass Valley, with an average of 14h and 54min of daylight.
What time of the year is the hottest in Grass Valley?
July stands out as Grass Valley's warmest month, with temperatures ranging between an average high of 90.1°F (32.3°C) and a low of 60.1°F (15.6°C).
What is the least humid month in Grass Valley?
With an average relative humidity of 37%, July is the least humid month.
What is the driest month in Grass Valley?
The months with the least rainfall in Grass Valley are July and August Rain falls for 1.1 days and accumulates 0.04" (1mm) of rain.
What month has the most sunshine in Grass Valley?
The month with the most sunshine in Grass Valley, California, is July, with an average of 12.2h of sunshine.
When is the highest UV index in Grass Valley?
July is the month with the highest UV index in Grass Valley, California, with an average maximum UV index of 7.
What is the month with the lowest UV index in Grass Valley?
November is the month with the lowest UV index in Grass Valley, California, with an average maximum UV index of 2.
What month is the coldest in Grass Valley?
December, noted for its average high-temperature of 51.3°F (10.7°C) and an average low-temperature of 37.2°F (2.9°C), is considered the coldest month in Grass Valley.
What is the month with the shortest days in Grass Valley?
December has the shortest days of the year in Grass Valley, with an average of 9h and 30min of daylight.
Average temperature
Grass Valley, CA
The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is December (51.3°F).
The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is December (37.2°F).
Average pressure
Grass Valley, CA
- Average pressure in January:
30.17"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
30.01"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.9"Hg
- Average pressure in July:
29.91"Hg - Average pressure in August:
29.91"Hg - Average pressure in September:
29.92"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.14"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed
Grass Valley, CA
- Average wind speed in January:
5.5mph - Average wind speed in February:
6mph - Average wind speed in March:
5.9mph - Average wind speed in April:
5.7mph - Average wind speed in May:
5.5mph - Average wind speed in June:
5.3mph
- Average wind speed in July:
5mph - Average wind speed in August:
4.8mph - Average wind speed in September:
5.2mph - Average wind speed in October:
5.4mph - Average wind speed in November:
5.2mph - Average wind speed in December:
5.3mph
The windiest month (with the highest average wind speed) is February (6mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity
Grass Valley, CA
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is July (37%).
Average rainfall
Grass Valley, CA
- Average rainfall in January:
5.31" - Average rainfall in February:
6.1" - Average rainfall in March:
6.57" - Average rainfall in April:
2.28" - Average rainfall in May:
1.73" - Average rainfall in June:
0.24"
- Average rainfall in July:
0.04" - Average rainfall in August:
0.04" - Average rainfall in September:
0.28" - Average rainfall in October:
1.57" - Average rainfall in November:
3.58" - Average rainfall in December:
5.35"
The wettest month (with the highest rainfall) is March (6.57").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days
Grass Valley, CA
- Average rainfall days in January:
10.3 days - Average rainfall days in February:
9.8 days - Average rainfall days in March:
15.1 days - Average rainfall days in April:
10.3 days - Average rainfall days in May:
6.5 days - Average rainfall days in June:
2.4 days
- Average rainfall days in July:
1.1 days - Average rainfall days in August:
1.2 days - Average rainfall days in September:
2.3 days - Average rainfall days in October:
4.1 days - Average rainfall days in November:
8.2 days - Average rainfall days in December:
10.7 days
The month with the highest number of rainy days is March (15.1 days).
The month with the least rainy days is July (1.1 days).
Average snowfall
Grass Valley, CA
- Average snowfall in January:
1.42" - Average snowfall in February:
6.42" - Average snowfall in March:
4.13" - Average snowfall in April:
0.24" - Average snowfall in May:
0.08" - Average snowfall in June:
0"
The month with the highest snowfall is February (6.42").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days
Grass Valley, CA
- Average snowfall days in January:
0.7 days - Average snowfall days in February:
2.2 days - Average snowfall days in March:
2.4 days - Average snowfall days in April:
0.3 days - Average snowfall days in May:
0.1 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:
0.6 days - Average snowfall days in December:
0.5 days
The month with the highest number of snowfall days is March (2.4 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight / Average sunshine
Grass Valley, CA
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 2min - Average daylight in June:
14h and 5min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 3min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
5h and 4min - Average sunshine in February:
5h and 5min - Average sunshine in March:
7h and 1min - Average sunshine in April:
9h and 5min - Average sunshine in May:
10h and 5min - Average sunshine in June:
11h and 5min
- Average sunshine in July:
12h and 1min - Average sunshine in August:
12h and 0min - Average sunshine in September:
11h and 1min - Average sunshine in October:
7h and 1min - Average sunshine in November:
6h and 2min - Average sunshine in December:
5h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is January (Average sunshine: 5h and 42min).
Average sunshine days
Grass Valley, CA
- Average sunshine days in January:
19.6 days - Average sunshine days in February:
17.3 days - Average sunshine days in March:
14.8 days - Average sunshine days in April:
18.8 days - Average sunshine days in May:
23.3 days - Average sunshine days in June:
27.3 days
- Average sunshine days in July:
29.8 days - Average sunshine days in August:
28.7 days - Average sunshine days in September:
26.9 days - Average sunshine days in October:
26.3 days - Average sunshine days in November:
21 days - Average sunshine days in December:
19.1 days
The month with the most sunshine days is July (29.8 days).
The month with the least sunshine days is March (14.8 days).
Average UV index
Grass Valley, CA
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is November (UV index 2).
Average cloud cover
Grass Valley, CA
The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility
Grass 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).
Grass Valley, California, USA
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