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, Oregon, is a wintry winter month, with an average temperature varying between 38.5°F (3.6°C) and 28°F (-2.2°C). In January, the average high-temperature is almost the same as in December - a still cold 38.5°F (3.6°C). Weather in January »
Weather in February
February, the last month of the winter in Grass Valley, is another cold month, with an average temperature varying between 29.7°F (-1.3°C) and 41.7°F (5.4°C). In February, the average high-temperature is almost the same as in January - a still cold 41.7°F (5.4°C). Weather in February »
Weather in March
March, the first month of the spring in Grass Valley, is a frosty month, with temperature in the range of an average high of 49.1°F (9.5°C) and an average low of 33.4°F (0.8°C). In March, the average high-temperature marginally rises from a cold 41.7°F (5.4°C) in February to a frosty 49.1°F (9.5°C). Weather in March »
Weather in April
April in Grass Valley, Oregon, is a mild spring month, with an average temperature varying between 38.5°F (3.6°C) and 57.4°F (14.1°C). In April, the average high-temperature slightly increases from a frosty 49.1°F (9.5°C) in March to a moderate 57.4°F (14.1°C). Weather in April »
Weather in May
May, the last month of the spring in Grass Valley, is an enjoyable month, with temperature in the range of an average high of 67.3°F (19.6°C) and an average low of 45°F (7.2°C). In Grass Valley, the average high-temperature in May rises from a mild 57.4°F (14.1°C) in April to a comfortable 67.3°F (19.6°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Grass Valley, Oregon, with an average temperature varying between 50.2°F (10.1°C) and 73.9°F (23.3°C). In June, the average high-temperature slightly increases from an enjoyable 67.3°F (19.6°C) in May to a warm 73.9°F (23.3°C). Weather in June »
Weather in July
July, like June, in Grass Valley, Oregon, is another warm summer month, with temperature in the range of an average high of 83.5°F (28.6°C) and an average low of 56.8°F (13.8°C). July is the warmest month, with an average high-temperature of 83.5°F (28.6°C) and an average low-temperature of 56.8°F (13.8°C). The average heat index in July is appraised at 84.2°F (29°C). Weather in July »
Weather in August
August, the last month of the summer in Grass Valley, is also a moderately hot month, with an average temperature varying between 83.3°F (28.5°C) and 57.9°F (14.4°C). In August, the average high-temperature is relatively the same as in July - a still moderately hot 83.3°F (28.5°C). Weather in August »
Weather in September
The first month of the autumn, September, is also an agreeable month in Grass Valley, Oregon, with an average temperature varying between 52.7°F (11.5°C) and 73.2°F (22.9°C). In Grass Valley, the average high-temperature in September decreases from a warm 83.3°F (28.5°C) in August to a pleasant 73.2°F (22.9°C). Weather in September »
Weather in October
October, the same as September, in Grass Valley, Oregon, is a moderate autumn month, with an average temperature varying between 43.7°F (6.5°C) and 58.8°F (14.9°C). In October, the average high-temperature decreases from a pleasant 73.2°F (22.9°C) in September to a moderate 58.8°F (14.9°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Grass Valley, Oregon, with an average temperature fluctuating between 34.5°F (1.4°C) and 46°F (7.8°C). In November, the average high-temperature drops from a moderate 58.8°F (14.9°C) in October to a frosty 46°F (7.8°C). Weather in November »
Weather in December
The first month of the winter, December, is also a wintry month in Grass Valley, Oregon, with an average temperature varying between 27°F (-2.8°C) and 37.4°F (3°C). The coldest month is December, with an average high-temperature of 37.4°F (3°C) and an average low-temperature of 27°F (-2.8°C). Weather in December »
[Resources]FAQ
What is the most humid month in Grass Valley?
The most humid month in Grass Valley, Oregon, is January, with an average relative humidity of 84%.
What is the rainiest month in Grass Valley?
The month with the most rainfall is January, when the rain falls for 13.3 days and typically aggregates up to 1.93" (49mm) of precipitation.
How much does it rain in Grass Valley?
Throughout the year, in Grass Valley, Oregon, there are 112.2 rainfall days, and 10.91" (277mm) of precipitation is accumulated.
When does it snow in Grass Valley?
Months with snowfall in Grass Valley are January through March, November and December.
How much does it snow in Grass Valley?
Throughout the year, in Grass Valley, there are 12.6 snowfall days, and 7.6" (193mm) of snow is accumulated.
What is the month with the least sunshine in Grass Valley?
January has the least sunshine of the year, with an average of 5h of sunshine.
What is the month with the lowest UV index in Grass Valley?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Grass Valley.
What is the snowiest month in Grass Valley?
The month with the most snowfall in Grass Valley is February, when snow falls for 3.9 days and typically aggregates up to 2.87" (73mm) of snow.
When is Daylight Saving Time (DST) in Grass Valley?
On Sunday, March 12. 2023, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 5. 2023, 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 April through October.
When are the longest days in Grass Valley?
With an average of 15h and 37min of daylight, June has the longest days of the year in Grass Valley, Oregon.
What is the warmest month in Grass Valley?
With an average high-temperature of 83.5°F (28.6°C) and an average low-temperature of 56.8°F (13.8°C), July is the warmest month in Grass Valley.
What is the driest month in Grass Valley?
July is the month with the least rainfall in Grass Valley, Oregon. Rain falls for 2.9 days and accumulates 0.12" (3mm) of precipitation.
What is the month with the most sunshine in Grass Valley?
July and August, with an average of 12h of sunshine, are months with the most sunshine in Grass Valley.
What is the month with the highest UV index in Grass Valley?
With an average maximum UV index of 6, July is the month with the highest UV index.
What is the least humid month in Grass Valley?
The least humid month is August, with an average relative humidity of 46%.
What is the coldest month in Grass Valley?
December is the coldest month in Grass Valley, Oregon, with an average high-temperature of 37.4°F (3°C) and an average low-temperature of 27°F (-2.8°C).
What is the month with the shortest days in Grass Valley?
The month with the shortest days in Grass Valley, Oregon, is December, with an average of 8h and 47min of daylight.
Average temperature
Grass Valley, OR
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is December (37.4°F).
The month with the highest average low temperature is August (57.9°F).
The coldest month (with the lowest average low temperature) is December (27°F).
Average pressure
Grass Valley, OR
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.03"Hg - Average pressure in April:
30.03"Hg - Average pressure in May:
29.98"Hg - Average pressure in June:
29.97"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.95"Hg - Average pressure in September:
29.98"Hg - Average pressure in October:
30.05"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.95"Hg).
Average wind speed
Grass Valley, OR
- Average wind speed in January:
5mph - Average wind speed in February:
5.7mph - Average wind speed in March:
6.1mph - Average wind speed in April:
7.1mph - Average wind speed in May:
7.1mph - Average wind speed in June:
7.9mph
- Average wind speed in July:
7.4mph - Average wind speed in August:
6.7mph - Average wind speed in September:
6mph - Average wind speed in October:
5.4mph - Average wind speed in November:
5.5mph - Average wind speed in December:
5mph
The windiest month (with the highest average wind speed) is June (7.9mph).
The calmest months (with the lowest average wind speed) are January and December (5mph).
Average humidity
Grass Valley, OR
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is August (46%).
Average rainfall
Grass Valley, OR
- Average rainfall in January:
1.93" - Average rainfall in February:
1.34" - Average rainfall in March:
1.26" - Average rainfall in April:
0.75" - Average rainfall in May:
0.79" - Average rainfall in June:
0.39"
- Average rainfall in July:
0.12" - Average rainfall in August:
0.28" - Average rainfall in September:
0.35" - Average rainfall in October:
0.94" - Average rainfall in November:
1.02" - Average rainfall in December:
1.73"
The wettest month (with the highest rainfall) is January (1.93").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days
Grass Valley, OR
- Average rainfall days in January:
13.3 days - Average rainfall days in February:
12.5 days - Average rainfall days in March:
14.3 days - Average rainfall days in April:
11.4 days - Average rainfall days in May:
8.1 days - Average rainfall days in June:
5.5 days
- Average rainfall days in July:
2.9 days - Average rainfall days in August:
3.1 days - Average rainfall days in September:
5.8 days - Average rainfall days in October:
10.5 days - Average rainfall days in November:
12.2 days - Average rainfall days in December:
12.6 days
The month with the highest number of rainy days is March (14.3 days).
The month with the least rainy days is July (2.9 days).
Average snowfall
Grass Valley, OR
The month with the highest snowfall is February (2.87").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Grass Valley, OR
- Average snowfall days in January:
3.1 days - Average snowfall days in February:
3.9 days - Average snowfall days in March:
1.2 days - Average snowfall days in April:
0 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:
0.5 days - Average snowfall days in December:
3.9 days
The months with the highest number of snowfall days are February and December (3.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Grass Valley, OR
- Average daylight in January:
9h and 13min - Average daylight in February:
10h and 26min - Average daylight in March:
11h and 58min - Average daylight in April:
13h and 33min - Average daylight in May:
14h and 55min - Average daylight in June:
15h and 37min
- Average daylight in July:
15h and 15min - Average daylight in August:
14h and 2min - Average daylight in September:
12h and 31min - Average daylight in October:
10h and 56min - Average daylight in November:
9h and 32min - Average daylight in December:
8h and 47min
The month with the longest days is June (Average daylight: 15h and 37min).
The month with the shortest days is December (Average daylight: 8h and 47min).
- Average sunshine in January:
5h - Average sunshine in February:
5h and 18min - Average sunshine in March:
7h and 36min - Average sunshine in April:
10h and 6min - Average sunshine in May:
11h and 6min - Average sunshine in June:
11h and 36min
- Average sunshine in July:
12h - Average sunshine in August:
12h - Average sunshine in September:
10h and 48min - Average sunshine in October:
6h and 30min - Average sunshine in November:
6h and 6min - Average sunshine in December:
5h and 6min
The months with the most sunshine are July and August (Average sunshine: 12h).
The month with the least sunshine is January (Average sunshine: 5h).
Average sunshine days
Grass Valley, OR
- Average sunshine days in January:
13.6 days - Average sunshine days in February:
12.3 days - Average sunshine days in March:
13.8 days - Average sunshine days in April:
16.1 days - Average sunshine days in May:
20.4 days - Average sunshine days in June:
22.8 days
- Average sunshine days in July:
27 days - Average sunshine days in August:
25.8 days - Average sunshine days in September:
22.3 days - Average sunshine days in October:
18.5 days - Average sunshine days in November:
14.6 days - Average sunshine days in December:
13.8 days
The month with the most sunshine days is July (27 days).
The month with the least sunshine days is February (12.3 days).
Average UV index
Grass Valley, OR
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Grass Valley, OR
The month with the most cloud cover is January (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 9).
Average visibility
Grass Valley, OR
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
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