Climate and monthly weather forecast
Cathan, WA

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Weather in January

January is a chilly winter month in Cathan, Washington, with an average temperature varying between 43.3°F (6.3°C) and 34.7°F (1.5°C). Shifting into January, Cathan records an average high-temperature of a chilly 43.3°F (6.3°C), presenting minor fluctuations compared to the previous month. Weather in January »

Weather in February

February, the last month of the winter in Cathan, is also a frosty month, with temperature in the range of an average low of 33.8°F (1°C) and an average high of 44.2°F (6.8°C). As Cathan welcomes February, the average high-temperature stabilizes at a still frosty 44.2°F (6.8°C), showing little deviation from January's 43.3°F (6.3°C). Weather in February »

Weather in March

March, the first month of the spring in Cathan, is also a frosty month, with temperature in the range of an average high of 48.4°F (9.1°C) and an average low of 36.3°F (2.4°C). March's commencement is accompanied by an average high-temperature of a still frosty 48.4°F (9.1°C), diverging marginally from February's 44.2°F (6.8°C). Weather in March »

Weather in April

April in Cathan, Washington, is a fresh spring month, with temperature in the range of an average low of 39.4°F (4.1°C) and an average high of 53.6°F (12°C). As March transitions into April, Cathan records an average high-temperature of a cool 53.6°F (12°C), showing a gentle shift from the preceding month. Weather in April »

Weather in May

May, the last month of the spring in Cathan, is a comfortable month, with an average temperature varying between 61.3°F (16.3°C) and 43.7°F (6.5°C). Cathan observes a slight ascent in average high-temperatures during May, adjusting from a cool 53.6°F (12°C) in April to an enjoyable 61.3°F (16.3°C). Weather in May »

Weather in June

June, the first month of the summer in Cathan, is still a refreshing month, with an average temperature ranging between max 66°F (18.9°C) and min 47.1°F (8.4°C). June's climate shows a minor adjustment in average high-temperatures to a still refreshing 66°F (18.9°C) from May's 61.3°F (16.3°C). Weather in June »

Weather in July

July is a pleasant summer month in Cathan, Washington, with an average temperature ranging between max 72°F (22.2°C) and min 50.5°F (10.3°C). Cathan in July experiences a slight uptick in the average high-temperature, adjusting from June's comfortable 66°F (18.9°C) to a pleasant 72°F (22.2°C). Weather in July »

Weather in August

The last month of the summer, August, is another pleasant month in Cathan, Washington, with an average temperature varying between 51.6°F (10.9°C) and 72.3°F (22.4°C). Cathan witnesses the warmest weather in August, with temperatures averaging a high of 72.3°F (22.4°C) and a low of 51.6°F (10.9°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a refreshing month in Cathan, Washington, with temperature in the range of an average high of 66.2°F (19°C) and an average low of 49.1°F (9.5°C). September's onset introduces a mild reduction in the average high-temperature, from a pleasant 72.3°F (22.4°C) in August to a refreshing 66.2°F (19°C). Weather in September »

Weather in October

October, the same as September, in Cathan, Washington, is another refreshing autumn month, with an average temperature ranging between max 56.3°F (13.5°C) and min 43.3°F (6.3°C). October brings a decrease in the average high-temperature, shifting from a comfortable 66.2°F (19°C) in September to a mild 56.3°F (13.5°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a frosty month in Cathan, Washington, with temperature in the range of an average low of 38.5°F (3.6°C) and an average high of 46.9°F (8.3°C). Observing a mild shift, the average high-temperature during November reduces from October's refreshing 56.3°F (13.5°C) to a frosty 46.9°F (8.3°C). Weather in November »

Weather in December

The first month of the winter, December, is still a cold month in Cathan, Washington, with an average temperature fluctuating between 41.7°F (5.4°C) and 34°F (1.1°C). December, characterized by an average high temperature of 41.7°F (5.4°C) and a low temperature of 34°F (1.1°C), is generally the coldest month. Weather in December »
Updated: Jul 22, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the most humid month?

January, February, November and December, with an average relative humidity of 85%, are most humid months.

How much does it rain?

Throughout the year, there are 188.6 rainfall days, and 34.92" (887mm) of precipitation is accumulated.

When does it snow?

January through April, November and December are months with snowfall.

How much does it snow?

In Cathan, during the entire year, snow falls for 11.6 days and aggregates up to 9.61" (244mm) of snow.

When is the lowest UV index?

January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the snowiest month?

February is the month with the most snowfall. Snow falls for 4.3 days and accumulates 4.45" (113mm) of snow.

When is Daylight Saving Time (DST)?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Cathan, 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?

May through October are months without snowfall.

When are the longest days?

With an average of 16h and 0min of daylight, June has the longest days of the year.

What is the least humid month?

July is the least humid month, with an average relative humidity of 73%.

What is the driest month?

July is the month with the least rainfall. Rain falls for 8 days and accumulates 0.51" (13mm) of precipitation.

What is the month with the highest UV index?

The month with the highest UV index is July, with an average maximum UV index of 5.

What is the warmest month?

August is the month that records the highest temperatures, with averages ranging from a high of 72.3°F (22.4°C) to a low of 51.6°F (10.9°C).

What month has the most sunshine in Cathan?

The month with the most sunshine is August, with an average of 10.7h of sunshine.

What is the wettest month?

The month with the most rainfall is November, when the rain falls for 20.2 days and typically aggregates up to 4.92" (125mm) of precipitation.

What month is the coldest?

Cathan's December weather reaches an average high of 41.7°F (5.4°C) and an average low of 34°F (1.1°C), making it the coldest month.

What is the month with the shortest days?

With an average of 8h and 24min of daylight, December has the shortest days of the year.

What is the month with the least sunshine?

The month with the least sunshine is December, with an average of 4.1h of sunshine.

Average temperature
Cathan, WA

Average temperature - Cathan, WA

The warmest month (with the highest average high temperature) is August (72.3°F).
The month with the lowest average high temperature is December (41.7°F).

The month with the highest average low temperature is August (51.6°F).
The coldest month (with the lowest average low temperature) is February (33.8°F).

Average pressure
Cathan, WA

Average pressure - Cathan, WA

The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).

Average wind speed
Cathan, WA

Average wind speed - Cathan, WA

The windiest months (with the highest average wind speed) are January and November (5.6mph).
The calmest month (with the lowest average wind speed) is August (3.3mph).

Average humidity
Cathan, WA

Average humidity - Cathan, WA

The months with the highest relative humidity are January, February, November and December (85%).
The month with the lowest relative humidity is July (73%).

Average rainfall
Cathan, WA

Average rainfall - Cathan, WA

The wettest month (with the highest rainfall) is November (4.92").
The driest month (with the least rainfall) is July (0.51").

Average rainfall days
Cathan, WA

Average rainfall days - Cathan, WA

The month with the highest number of rainy days is March (20.9 days).
The month with the least rainy days is August (6.9 days).

Average snowfall
Cathan, WA

Average snowfall - Cathan, WA

The month with the highest snowfall is February (4.45").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days
Cathan, WA

Average snowfall days - Cathan, WA

The month with the highest number of snowfall days is February (4.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight / Average sunshine
Cathan, WA

Average daylight / Average sunshine - Cathan, WA

The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).

The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).

Average sunshine days
Cathan, WA

Average sunshine days - Cathan, WA

The month with the most sunshine days is August (22 days).
The month with the least sunshine days is March (8.1 days).

Average UV index
Cathan, WA

Average UV index - Cathan, WA

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, October, November and December (UV index 2).

Average visibility
Cathan, WA

Average visibility - Cathan, WA

The months with the highest visibility are March, April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, November and December (5mi).

Cathan, Washington, USA

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