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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 in Grand Mound, Washington, is a frosty winter month, with an average temperature ranging between max 44.8°F (7.1°C) and min 34.2°F (1.2°C). With the onset of January, the average high-temperature registers at a chilly 44.8°F (7.1°C), subtly different from December's 42.6°F (5.9°C). Weather in January »
Weather in February
The last month of the winter, February, is another chilly month in Grand Mound, Washington, with an average temperature varying between 33.4°F (0.8°C) and 46.2°F (7.9°C). At the onset of February, Grand Mound records an average high-temperature of a still chilly 46.2°F (7.9°C), showing little deviation from the preceding month. Weather in February »
Weather in March
The first month of the spring, March, is a cool month in Grand Mound, Washington, with an average temperature varying between 35.2°F (1.8°C) and 50.5°F (10.3°C). Grand Mound's average high-temperature marks a cool 50.5°F (10.3°C) with the advent of March, closely mirroring that of the preceding month. Weather in March »
Weather in April
April in Grand Mound, Washington, is a refreshing spring month, with an average temperature ranging between max 56.7°F (13.7°C) and min 37.4°F (3°C). The arrival of April witnesses a small shift in the average high-temperature, moving from a cool 50.5°F (10.3°C) in March to a moderate 56.7°F (13.7°C). Weather in April »
Weather in May
May, the last month of the spring in Grand Mound, is an enjoyable month, with an average temperature fluctuating between 41.2°F (5.1°C) and 64.9°F (18.3°C). May witnesses a minor rise in the average high-temperature, transitioning from a moderate 56.7°F (13.7°C) in April to a still refreshing 64.9°F (18.3°C). Weather in May »
Weather in June
The first month of the summer, June, is an agreeable month in Grand Mound, Washington, with an average temperature ranging between min 45°F (7.2°C) and max 69.8°F (21°C). Grand Mound commences June with an average high-temperature of a pleasant 69.8°F (21°C), maintaining a close resemblance to the previous month. Weather in June »
Weather in July
July in Grand Mound, Washington, is a warm summer month, with an average temperature fluctuating between 48.6°F (9.2°C) and 76.6°F (24.8°C). July comes with a subtle rise, with the average high-temperature adjusting from a pleasant 69.8°F (21°C) in June to a moderately hot 76.6°F (24.8°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Grand Mound, Washington, with an average temperature varying between 77.4°F (25.2°C) and 49.8°F (9.9°C). Grand Mound records the warmest temperatures in August, averaging a high of 77.4°F (25.2°C) and a low of 49.8°F (9.9°C). Weather in August »
Weather in September
The first month of the autumn, September, is also an agreeable month in Grand Mound, Washington, with an average temperature ranging between max 70.2°F (21.2°C) and min 47.3°F (8.5°C). The arrival of September signals a subtle shift in temperature, down from a moderately hot 77.4°F (25.2°C) in August to an agreeable 70.2°F (21.2°C). Weather in September »
Weather in October
October, like September, is another refreshing autumn month in Grand Mound, Washington, with an average temperature fluctuating between 58.6°F (14.8°C) and 42.1°F (5.6°C). October indicates a shift in the average high-temperature, from September's agreeable 70.2°F (21.2°C) to a refreshing 58.6°F (14.8°C). Weather in October »
Weather in November
November, the last month of the autumn in Grand Mound, is another chilly month, with an average temperature fluctuating between 37.9°F (3.3°C) and 48.4°F (9.1°C). The move into November indicates a reduction in the average high-temperature, down from October's moderate 58.6°F (14.8°C) to a frosty 48.4°F (9.1°C). Weather in November »
Weather in December
December, the first month of the winter in Grand Mound, is also an icy month, with an average temperature ranging between min 33.1°F (0.6°C) and max 42.6°F (5.9°C). The coldest period tends to be December, when average temperatures fluctuate between a high of 42.6°F (5.9°C) and a low of 33.1°F (0.6°C). Weather in December »
Updated: Aug 19, 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
What is the wettest month?
The month with the most rainfall is January, when the rain falls for 17.8 days and typically aggregates up to 3.86" (98mm) of precipitation.
How much does it rain?
In Grand Mound, during the entire year, the rain falls for 168 days and collects up to 23.94" (608mm) of precipitation.
When does it snow?
January through March, November and December are months with snowfall.
How much does it snow?
Throughout the year, there are 7.9 snowfall days, and 4.02" (102mm) of snow is accumulated.
What are the months with the lowest UV index?
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
What is the snowiest month?
The month with the most snowfall is February, when snow falls for 2.7 days and typically aggregates up to 1.54" (39mm) of snow.
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.
When it does not snow?
In Grand Mound, snow does not fall in April through October.
When are the longest days?
With an average of 15h and 48min of daylight, June has the longest days of the year.
When is the highest UV index?
June and July, with an average maximum UV index of 5, are months with the highest UV index.
What is the least humid month?
With an average relative humidity of 73%, July is the least humid month.
What is the driest month?
The month with the least rainfall is July, when the rain falls for 6.3 days and typically collects 0.35" (9mm) of precipitation.
What is the hottest time of year?
Grand Mound's warmest month, August, generally records average temperatures ranging from a high of 77.4°F (25.2°C) to a low of 49.8°F (9.9°C).
What month has the most sunshine?
August has the most sunshine of the year in Grand Mound, with an average of 10.1h of sunshine.
What is the most humid month?
With an average relative humidity of 90%, November is the most humid month.
What part of the year is the coldest?
Grand Mound reaches its average lowest temperatures in December, measuring 42.6°F (5.9°C) at the peak and 33.1°F (0.6°C) at the lowest.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 8h and 36min of daylight.
What is the month with the least sunshine?
December has the least sunshine of the year, with an average of 3.5h of sunshine.
Average temperature
Grand Mound, WA
The warmest month (with the highest average high temperature) is August (77.4°F).
The month with the lowest average high temperature is December (42.6°F).
The month with the highest average low temperature is August (49.8°F).
The coldest month (with the lowest average low temperature) is December (33.1°F).
Average pressure
Grand Mound, WA
- Average pressure in January:
30.09"Hg - Average pressure in February:
30.06"Hg - Average pressure in March:
30.02"Hg - Average pressure in April:
30.06"Hg - Average pressure in May:
30.04"Hg - Average pressure in June:
30.04"Hg
- Average pressure in July:
30.06"Hg - Average pressure in August:
30.02"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.04"Hg - Average pressure in December:
30.08"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.02"Hg).
Average wind speed
Grand Mound, WA
- Average wind speed in January:
4.5mph - Average wind speed in February:
4.3mph - Average wind speed in March:
4.5mph - Average wind speed in April:
4.4mph - Average wind speed in May:
4mph - Average wind speed in June:
4.2mph
- Average wind speed in July:
4mph - Average wind speed in August:
3.8mph - Average wind speed in September:
3.6mph - Average wind speed in October:
3.9mph - Average wind speed in November:
4.5mph - Average wind speed in December:
4.2mph
The windiest months (with the highest average wind speed) are January, March and November (4.5mph).
The calmest month (with the lowest average wind speed) is September (3.6mph).
Average humidity
Grand Mound, WA
The month with the highest relative humidity is November (90%).
The month with the lowest relative humidity is July (73%).
Average rainfall
Grand Mound, WA
- Average rainfall in January:
3.86" - Average rainfall in February:
2.32" - Average rainfall in March:
2.6" - Average rainfall in April:
1.85" - Average rainfall in May:
1.34" - Average rainfall in June:
1.06"
- Average rainfall in July:
0.35" - Average rainfall in August:
0.39" - Average rainfall in September:
1.14" - Average rainfall in October:
2.76" - Average rainfall in November:
2.52" - Average rainfall in December:
3.74"
The wettest month (with the highest rainfall) is January (3.86").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days
Grand Mound, WA
- Average rainfall days in January:
17.8 days - Average rainfall days in February:
15.9 days - Average rainfall days in March:
19.8 days - Average rainfall days in April:
17.6 days - Average rainfall days in May:
13.4 days - Average rainfall days in June:
10.9 days
- Average rainfall days in July:
6.3 days - Average rainfall days in August:
5.6 days - Average rainfall days in September:
10.6 days - Average rainfall days in October:
14.9 days - Average rainfall days in November:
17.3 days - Average rainfall days in December:
17.9 days
The month with the highest number of rainy days is March (19.8 days).
The month with the least rainy days is August (5.6 days).
Average snowfall
Grand Mound, WA
The month with the highest snowfall is February (1.54").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Grand Mound, WA
- Average snowfall days in January:
1.8 days - Average snowfall days in February:
2.7 days - Average snowfall days in March:
1.5 days - Average snowfall days in April:
0.1 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:
0.6 days - Average snowfall days in December:
1.2 days
The month with the highest number of snowfall days is February (2.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Grand Mound, WA
- Average daylight in January:
9h and 0min - Average daylight in February:
10h and 2min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 4min - Average daylight in May:
15h and 1min - Average daylight in June:
15h and 5min
- Average daylight in July:
15h and 2min - Average daylight in August:
14h and 1min - Average daylight in September:
12h and 3min - Average daylight in October:
10h and 5min - Average daylight in November:
9h and 2min - Average daylight in December:
8h and 4min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in January:
3h and 4min - Average sunshine in February:
3h and 4min - Average sunshine in March:
4h and 5min - Average sunshine in April:
6h and 5min - Average sunshine in May:
8h and 0min - Average sunshine in June:
8h and 4min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
10h and 1min - Average sunshine in September:
8h and 2min - Average sunshine in October:
4h and 5min - Average sunshine in November:
4h and 0min - Average sunshine in December:
3h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).
Average sunshine days
Grand Mound, WA
- Average sunshine days in January:
10.7 days - Average sunshine days in February:
9.3 days - Average sunshine days in March:
9.3 days - Average sunshine days in April:
10.1 days - Average sunshine days in May:
14.8 days - Average sunshine days in June:
15.8 days
- Average sunshine days in July:
20.8 days - Average sunshine days in August:
20.9 days - Average sunshine days in September:
16.9 days - Average sunshine days in October:
14.3 days - Average sunshine days in November:
10.5 days - Average sunshine days in December:
10.8 days
The month with the most sunshine days is August (20.9 days).
The months with the least sunshine days are February and March (9.3 days).
Average UV index
Grand Mound, WA
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Grand Mound, WA
The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are July and August (Cloud cover 38).
Average visibility
Grand Mound, WA
The month with the highest visibility is July (5mi).
The months with the lowest visibility are January, February, March, April, May, June, August, September, October, November and December (4mi).
Grand Mound, Washington, USA
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