Climate and monthly weather forecastRoche Harbor, WA
Climate and monthly weather forecast
Weather in January
January, the same as December, in Roche Harbor, Washington, is another chilly winter month, with an average temperature varying between 41°F (5°C) and 45.3°F (7.4°C). January, February and December are characterised by lowest temperatures, with an average high of 45.3°F (7.4°C). Weather in January »Weather in February
The last month of the winter, February, is another chilly month in Roche Harbor, Washington, with temperature in the range of an average low of 40.5°F (4.7°C) and an average high of 45.3°F (7.4°C). January, February and December are the coldest months, with an average high-temperature of 45.3°F (7.4°C). Weather in February »Weather in March
March, the first month of the spring in Roche Harbor, is still a chilly month, with temperature in the range of an average high of 48.4°F (9.1°C) and an average low of 43°F (6.1°C). Roche Harbor, Washington, notes an average high-temperature of a still chilly 48.4°F (9.1°C) in March, displaying minor variation from February. Weather in March »Weather in April
April is a cool spring month in Roche Harbor, Washington, with temperature in the range of an average high of 52.2°F (11.2°C) and an average low of 46.2°F (7.9°C). The high-temperature average in April for Roche Harbor is a fresh 52.2°F (11.2°C), staying closely aligned with March's conditions. Weather in April »Weather in May
May, the last month of the spring in Roche Harbor, is a moderate month, with an average temperature fluctuating between 50.9°F (10.5°C) and 57.7°F (14.3°C). Roche Harbor's weather in May presents a minor rise in the average high-temperature, moving from a cool 52.2°F (11.2°C) in April to a moderate 57.7°F (14.3°C). Weather in May »Weather in June
June, the first month of the summer in Roche Harbor, is a comfortable month, with an average temperature ranging between max 61.3°F (16.3°C) and min 54°F (12.2°C). Roche Harbor records an average high-temperature of a comfortable 61.3°F (16.3°C) in June, closely mirroring the climate of the previous month. Weather in June »Weather in July
July, like June, in Roche Harbor, Washington, is another enjoyable summer month, with an average temperature varying between 64.9°F (18.3°C) and 57.2°F (14°C). With average temperatures fluctuating between a high of 64.9°F (18.3°C) and a low of 57.2°F (14°C), July stands out as the warmest month. Weather in July »Weather in August
August, the last month of the summer in Roche Harbor, is another comfortable month, with an average temperature varying between 57.7°F (14.3°C) and 64.4°F (18°C). Roche Harbor's August average high-temperature settles at a still comfortable 64.4°F (18°C), showing a near match with the preceding month. Weather in August »Weather in September
The first month of the autumn, September, is still a comfortable month in Roche Harbor, Washington, with an average temperature ranging between min 55.6°F (13.1°C) and max 61.3°F (16.3°C). As Roche Harbor welcomes September, the average high-temperature is noted at a still enjoyable 61.3°F (16.3°C), closely aligning with the preceding month. Weather in September »Weather in October
October, like September, is a moderate autumn month in Roche Harbor, Washington, with an average temperature fluctuating between 50.9°F (10.5°C) and 55.4°F (13°C). October ushers in a minute temperature change, with average high-temperatures reducing from September's comfortable 61.3°F (16.3°C) to a mild 55.4°F (13°C). Weather in October »Weather in November
The last month of the autumn, November, is another cool month in Roche Harbor, Washington, with an average temperature varying between 45.5°F (7.5°C) and 50.2°F (10.1°C). The arrival of November brings an average high-temperature of a cool 50.2°F (10.1°C), nearly identical to October's 55.4°F (13°C). Weather in November »Weather in December
December, the first month of the winter in Roche Harbor, is still a chilly month, with temperature in the range of an average low of 40.6°F (4.8°C) and an average high of 45.3°F (7.4°C). In Roche Harbor, the months of January, February and December are known for the lowest temperatures, reaching an average high of 45.3°F (7.4°C). Weather in December »Updated: Aug 23, 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
Roche Harbor experiences the lowest of its temperatures in January, February and December, when the average high-temperatures rise to 45.3°F (7.4°C).
The months with the highest humidity are January, August and September, with an average relative humidity of 79%.
In Roche Harbor, during the entire year, the rain falls for 167.7 days and collects up to 23.46" (596mm) of precipitation.
Months with snowfall are January through March, November and December.
Throughout the year, there are 6.9 snowfall days, and 3.43" (87mm) of snow is accumulated.
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
The month with the most snowfall is February, when snow falls for 2.7 days and typically aggregates up to 1.77" (45mm) of snow.
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.
With an average relative humidity of 76%, April is the least humid month in Roche Harbor.
April through October are months without snowfall.
June has the longest days of the year, with an average of 16h and 6min of daylight.
Roche Harbor's July weather reaches an average high of 64.9°F (18.3°C) and an average low of 57.2°F (14°C), making it the warmest month.
July is the month with the least rainfall. Rain falls for 6.1 days and accumulates 0.43" (11mm) of precipitation.
July has the most sunshine of the year, with an average of 11.1h of sunshine.
The month with the highest UV index is July, with an average maximum UV index of 5.
November is the month with the most rainfall. Rain falls for 19.1 days and accumulates 3.43" (87mm) of precipitation.
December has the shortest days of the year, with an average of 8h and 24min of daylight.
December has the least sunshine of the year, with an average of 4.1h of sunshine.
Average temperature
Roche Harbor, WA
The warmest month (with the highest average high temperature) is July (64.9°F).
The months with the lowest average high temperature are January, February and December (45.3°F).
The month with the highest average low temperature is August (57.7°F).
The coldest month (with the lowest average low temperature) is February (40.5°F).
Average pressure
Roche Harbor, WA
- Average pressure in January:
30.07"Hg - Average pressure in February:
30.05"Hg - Average pressure in March:
30"Hg - Average pressure in April:
30.04"Hg - Average pressure in May:
30.03"Hg - Average pressure in June:
30.03"Hg
- Average pressure in July:
30.05"Hg - Average pressure in August:
30.02"Hg - Average pressure in September:
30.01"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.02"Hg - Average pressure in December:
30.06"Hg
The month with the highest atmospheric pressure is January (30.07"Hg).
The month with the lowest atmospheric pressure is March (30"Hg).
Average wind speed
Roche Harbor, WA
- Average wind speed in January:
9.7mph - Average wind speed in February:
9.7mph - Average wind speed in March:
9.4mph - Average wind speed in April:
8.5mph - Average wind speed in May:
6.2mph - Average wind speed in June:
6.5mph
- Average wind speed in July:
5.7mph - Average wind speed in August:
4.9mph - Average wind speed in September:
5.7mph - Average wind speed in October:
7.7mph - Average wind speed in November:
10.7mph - Average wind speed in December:
10.5mph
The windiest month (with the highest average wind speed) is November (10.7mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity
Roche Harbor, WA
The months with the highest relative humidity are January, August and September (79%).
The month with the lowest relative humidity is April (76%).
Average rainfall
Roche Harbor, WA
- Average rainfall in January:
3.15" - Average rainfall in February:
2.87" - Average rainfall in March:
2.17" - Average rainfall in April:
1.69" - Average rainfall in May:
1.34" - Average rainfall in June:
0.91"
- Average rainfall in July:
0.43" - Average rainfall in August:
0.71" - Average rainfall in September:
1.34" - Average rainfall in October:
2.48" - Average rainfall in November:
3.43" - Average rainfall in December:
2.95"
The wettest month (with the highest rainfall) is November (3.43").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days
Roche Harbor, WA
- Average rainfall days in January:
17.3 days - Average rainfall days in February:
16.8 days - Average rainfall days in March:
20.2 days - Average rainfall days in April:
16.3 days - Average rainfall days in May:
12.3 days - Average rainfall days in June:
9.6 days
- Average rainfall days in July:
6.1 days - Average rainfall days in August:
5.3 days - Average rainfall days in September:
11.6 days - Average rainfall days in October:
15.5 days - Average rainfall days in November:
19.1 days - Average rainfall days in December:
17.6 days
The month with the highest number of rainy days is March (20.2 days).
The month with the least rainy days is August (5.3 days).
Average snowfall
Roche Harbor, WA
The month with the highest snowfall is February (1.77").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Roche Harbor, WA
- Average snowfall days in January:
1.5 days - Average snowfall days in February:
2.7 days - Average snowfall days in March:
0.7 days - Average snowfall days in April:
0.2 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:
1.3 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
Roche Harbor, WA
- Average daylight in January:
8h and 48min - Average daylight in February:
10h and 12min - Average daylight in March:
11h and 54min - Average daylight in April:
13h and 42min - Average daylight in May:
15h and 18min - Average daylight in June:
16h and 6min
- Average daylight in July:
15h and 42min - Average daylight in August:
14h and 18min - Average daylight in September:
12h and 36min - Average daylight in October:
10h and 48min - Average daylight in November:
9h and 12min - Average daylight in December:
8h and 24min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in January:
4h and 12min - Average sunshine in February:
4h and 18min - Average sunshine in March:
6h and 24min - Average sunshine in April:
8h and 24min - Average sunshine in May:
9h and 36min - Average sunshine in June:
10h and 12min
- Average sunshine in July:
11h and 6min - Average sunshine in August:
10h and 48min - Average sunshine in September:
9h and 24min - Average sunshine in October:
5h and 30min - Average sunshine in November:
4h and 42min - Average sunshine in December:
4h and 6min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).
Average sunshine days
Roche Harbor, WA
- Average sunshine days in January:
10.8 days - Average sunshine days in February:
8.9 days - Average sunshine days in March:
8.8 days - Average sunshine days in April:
11.4 days - Average sunshine days in May:
17.1 days - Average sunshine days in June:
18.1 days
- Average sunshine days in July:
24.3 days - Average sunshine days in August:
24.7 days - Average sunshine days in September:
17.4 days - Average sunshine days in October:
13.8 days - Average sunshine days in November:
8.7 days - Average sunshine days in December:
10.6 days
The month with the most sunshine days is August (24.7 days).
The month with the least sunshine days is November (8.7 days).
Average UV index
Roche Harbor, WA
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Roche Harbor, WA
The months with the most cloud cover are February and December (Cloud cover 56).
The months with the least cloud cover are July and August (Cloud cover 23).
Average visibility
Roche Harbor, WA
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).
