Climate and monthly weather forecastCathlamet, WA
Climate and monthly weather forecast
Weather in January
January in Cathlamet, Washington, is a chilly winter month, with an average temperature varying between 44.2°F (6.8°C) and 33.4°F (0.8°C). The average high-temperature in January, at a frosty 44.2°F (6.8°C), reveals a modest deviation from December's 42.3°F (5.7°C). Weather in January »Weather in February
The last month of the winter, February, is also a frosty month in Cathlamet, Washington, with an average temperature varying between 45.9°F (7.7°C) and 33.4°F (0.8°C). With the onset of February, the average high-temperature stands at a still chilly 45.9°F (7.7°C), closely aligned with January's 44.2°F (6.8°C). Weather in February »Weather in March
The first month of the spring, March, is a cool month in Cathlamet, Washington, with an average temperature varying between 35.1°F (1.7°C) and 50.2°F (10.1°C). With March's advent, Cathlamet sees an average high-temperature of a cool 50.2°F (10.1°C), subtly shifted from February's 45.9°F (7.7°C). Weather in March »Weather in April
April in Cathlamet, Washington, is a moderate spring month, with temperature in the range of an average low of 36.5°F (2.5°C) and an average high of 55.4°F (13°C). With the arrival of April, Cathlamet's average high-temperature registers at a moderate 55.4°F (13°C), indicating a subtle variation from the previous month. Weather in April »Weather in May
May, the last month of the spring in Cathlamet, is a comfortable month, with temperature in the range of an average low of 40.6°F (4.8°C) and an average high of 63.7°F (17.6°C). The shift into May brings a slight increase in the average high-temperature, moving from a mild 55.4°F (13°C) in April to a still refreshing 63.7°F (17.6°C). Weather in May »Weather in June
The first month of the summer, June, is a pleasant month in Cathlamet, Washington, with temperature in the range of an average low of 45°F (7.2°C) and an average high of 68.5°F (20.3°C). The transition into June reveals an average high-temperature of an agreeable 68.5°F (20.3°C), mirroring a close resemblance to May. Weather in June »Weather in July
July in Cathlamet, Washington, is a warm summer month, with an average temperature varying between 48.7°F (9.3°C) and 75°F (23.9°C). Cathlamet's transition into July is noticed by a slight rise in the average high-temperature, advancing from an agreeable 68.5°F (20.3°C) in June to a moderately hot 75°F (23.9°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Cathlamet, Washington, with an average temperature ranging between max 76.5°F (24.7°C) and min 49.8°F (9.9°C). August, with an average high of 76.5°F (24.7°C) and a low of 49.8°F (9.9°C), signifies the warmest month of the year. Weather in August »Weather in September
September, the first month of the autumn in Cathlamet, is still a pleasant month, with an average temperature ranging between max 69.6°F (20.9°C) and min 47.3°F (8.5°C). A moderate decline in average high-temperatures is noted in September, moving from a moderately hot 76.5°F (24.7°C) in August to an agreeable 69.6°F (20.9°C). Weather in September »Weather in October
October, the same as September, in Cathlamet, Washington, is another refreshing autumn month, with an average temperature fluctuating between 42.4°F (5.8°C) and 58.8°F (14.9°C). Start of October brings a shift in the average high-temperature, falling from September's agreeable 69.6°F (20.9°C) to a refreshing 58.8°F (14.9°C). Weather in October »Weather in November
November, the last month of the autumn in Cathlamet, is also a frosty month, with an average temperature ranging between max 48.2°F (9°C) and min 37.8°F (3.2°C). Transition from October to November is accompanied by a temperature drop, with average high-temperatures decreasing from a mild 58.8°F (14.9°C) to a frosty 48.2°F (9°C). Weather in November »Weather in December
The first month of the winter, December, is still a cold month in Cathlamet, Washington, with an average temperature varying between 32.9°F (0.5°C) and 42.3°F (5.7°C). Temperature records mark December as the coldest month, with highs averaging 42.3°F (5.7°C) and lows at 32.9°F (0.5°C). Weather in December »Updated: Feb 14, 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
January is the month with the most rainfall in Cathlamet. Rain falls for 14.1 days and accumulates 1.77" (45mm) of precipitation.
In Cathlamet, during the entire year, the rain falls for 141.6 days and collects up to 11.57" (294mm) of precipitation.
January through March and December are months with snowfall in Cathlamet.
Throughout the year, there are 4.6 snowfall days, and 1.54" (39mm) of snow is accumulated.
The months with the lowest UV index in Cathlamet are January, February, November and December, with an average maximum UV index of 2.
February, November and December, with an average relative humidity of 89%, are most humid months in Cathlamet, Washington.
The month with the most snowfall is February, when snow falls for 1.8 days and typically aggregates up to 0.55" (14mm) of snow.
The month with the least sunshine in Cathlamet, Washington, is February, with an average of 3.2h of sunshine.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Cathlamet, Washington, 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.
April through November are months without snowfall in Cathlamet, Washington.
June has the longest days of the year, with an average of 15h and 42min of daylight.
June and July, with an average maximum UV index of 5, are months with the highest UV index in Cathlamet.
July is the least humid month in Cathlamet, with an average relative humidity of 75%.
Temperature readings in Cathlamet reach their annual highs in August, averaging 76.5°F (24.7°C) and a minimum average of 49.8°F (9.9°C).
August is the month with the least rainfall in Cathlamet, Washington. Rain falls for 4.7 days and accumulates 0.24" (6mm) of precipitation.
The month with the most sunshine in Cathlamet is August, with an average of 10h of sunshine.
December is Cathlamet's coldest month, registering average high temperatures of 42.3°F (5.7°C) and lows of 32.9°F (0.5°C).
The month with the shortest days is December, with an average of 8h and 42min of daylight.
Average temperature
Cathlamet, WA
The warmest month (with the highest average high temperature) is August (76.5°F).
The month with the lowest average high temperature is December (42.3°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 (32.9°F).
Average pressure
Cathlamet, 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:
30.07"Hg - Average pressure in May:
30.04"Hg - Average pressure in June:
30.05"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:
30.05"Hg - Average pressure in December:
30.09"Hg
The months with the highest atmospheric pressure are January and December (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.02"Hg).
Average wind speed
Cathlamet, WA
- Average wind speed in January:
4.9mph - Average wind speed in February:
4.5mph - Average wind speed in March:
4.7mph - Average wind speed in April:
4.5mph - Average wind speed in May:
4.3mph - Average wind speed in June:
4.2mph
- Average wind speed in July:
4.3mph - Average wind speed in August:
3.9mph - Average wind speed in September:
3.8mph - Average wind speed in October:
4.1mph - Average wind speed in November:
4.8mph - Average wind speed in December:
4.7mph
The windiest month (with the highest average wind speed) is January (4.9mph).
The calmest month (with the lowest average wind speed) is September (3.8mph).
Average humidity
Cathlamet, WA
The months with the highest relative humidity are February, November and December (89%).
The month with the lowest relative humidity is July (75%).
Average rainfall
Cathlamet, WA
- Average rainfall in January:
1.77" - Average rainfall in February:
1.1" - Average rainfall in March:
1.22" - Average rainfall in April:
1.06" - Average rainfall in May:
0.91" - Average rainfall in June:
0.79"
- Average rainfall in July:
0.28" - Average rainfall in August:
0.24" - Average rainfall in September:
0.67" - Average rainfall in October:
1.14" - Average rainfall in November:
0.94" - Average rainfall in December:
1.46"
The wettest month (with the highest rainfall) is January (1.77").
The driest month (with the least rainfall) is August (0.24").
Average rainfall days
Cathlamet, WA
- Average rainfall days in January:
14.1 days - Average rainfall days in February:
11.8 days - Average rainfall days in March:
16.3 days - Average rainfall days in April:
16.1 days - Average rainfall days in May:
13.2 days - Average rainfall days in June:
10.8 days
- Average rainfall days in July:
5 days - Average rainfall days in August:
4.7 days - Average rainfall days in September:
9.2 days - Average rainfall days in October:
12.5 days - Average rainfall days in November:
14.3 days - Average rainfall days in December:
13.6 days
The month with the highest number of rainy days is March (16.3 days).
The month with the least rainy days is August (4.7 days).
Average snowfall
Cathlamet, WA
The month with the highest snowfall is February (0.55").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days
Cathlamet, WA
- Average snowfall days in January:
1.1 days - Average snowfall days in February:
1.8 days - Average snowfall days in March:
0.8 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:
0.4 days - Average snowfall days in December:
0.5 days
The month with the highest number of snowfall days is February (1.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Cathlamet, WA
- Average daylight in January:
9h and 6min - Average daylight in February:
10h and 24min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 36min - Average daylight in May:
15h and 0min - Average daylight in June:
15h and 42min
- Average daylight in July:
15h and 18min - Average daylight in August:
14h and 6min - Average daylight in September:
12h and 30min - Average daylight in October:
10h and 54min - Average daylight in November:
9h and 24min - Average daylight in December:
8h and 42min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in January:
3h and 24min - Average sunshine in February:
3h and 12min - Average sunshine in March:
4h and 36min - Average sunshine in April:
6h and 12min - Average sunshine in May:
7h and 24min - Average sunshine in June:
8h and 6min
- Average sunshine in July:
9h and 36min - Average sunshine in August:
10h and 0min - Average sunshine in September:
8h and 6min - Average sunshine in October:
4h and 42min - Average sunshine in November:
3h and 30min - Average sunshine in December:
3h and 18min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 3h and 12min).
Average sunshine days
Cathlamet, WA
- Average sunshine days in January:
13.9 days - Average sunshine days in February:
12.8 days - Average sunshine days in March:
11.8 days - Average sunshine days in April:
11.7 days - Average sunshine days in May:
16 days - Average sunshine days in June:
16 days
- Average sunshine days in July:
24.4 days - Average sunshine days in August:
24.6 days - Average sunshine days in September:
18.5 days - Average sunshine days in October:
15.5 days - Average sunshine days in November:
13 days - Average sunshine days in December:
15.7 days
The month with the most sunshine days is August (24.6 days).
The month with the least sunshine days is April (11.7 days).
Average UV index
Cathlamet, 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
Cathlamet, WA
The months with the most cloud cover are February and March (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 42).
Average visibility
Cathlamet, WA
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
