Climate and monthly weather forecast
Chattaroy, WA

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Weather in January

January in Chattaroy, Washington, is a wintry winter month, with an average temperature varying between 32.4°F (0.2°C) and 21.2°F (-6°C). January's average high-temperature stands at a cold 32.4°F (0.2°C), showing little deviation from December's 31.3°F (-0.4°C). Weather in January »

Weather in February

The last month of the winter, February, is also an icy month in Chattaroy, Washington, with an average temperature ranging between max 35.1°F (1.7°C) and min 21.6°F (-5.8°C). February's arrival registers an average high-temperature of a still cold 35.1°F (1.7°C), closely aligning with the temperature of the previous month. Weather in February »

Weather in March

March, the first month of the spring in Chattaroy, is a chilly month, with an average temperature fluctuating between 28.9°F (-1.7°C) and 44.8°F (7.1°C). The arrival of March brings an increase in high-temperatures, moving from an icy 35.1°F (1.7°C) in February to a chilly 44.8°F (7.1°C). Weather in March »

Weather in April

April is a cool spring month in Chattaroy, Washington, with an average temperature varying between 33.6°F (0.9°C) and 54.7°F (12.6°C). An increase in the average high-temperature marks April, moving from March's frosty 44.8°F (7.1°C) to a cool 54.7°F (12.6°C). Weather in April »

Weather in May

May, the last month of the spring in Chattaroy, is an enjoyable month, with an average temperature fluctuating between 41.4°F (5.2°C) and 65.8°F (18.8°C). As Chattaroy enters May, the average high-temperature increases from the a cool 54.7°F (12.6°C) of April to an enjoyable 65.8°F (18.8°C). Weather in May »

Weather in June

June, the first month of the summer in Chattaroy, is a pleasant month, with an average temperature ranging between max 71.8°F (22.1°C) and min 46°F (7.8°C). A slight uplift in the average high-temperature marks June, adjusting from May's comfortable 65.8°F (18.8°C) to a pleasant 71.8°F (22.1°C). Weather in June »

Weather in July

July in Chattaroy, Washington, is a moderately hot summer month, with an average temperature fluctuating between 52.5°F (11.4°C) and 83.5°F (28.6°C). July's arrival brings a temperature shift, moving from a pleasant 71.8°F (22.1°C) in June to a moderately hot 83.5°F (28.6°C). Weather in July »

Weather in August

August, the last month of the summer in Chattaroy, is also a moderately hot month, with an average temperature ranging between max 84°F (28.9°C) and min 54.3°F (12.4°C). The month of August sees the highest average temperatures, reaching 84°F (28.9°C) at the peak and 54.3°F (12.4°C) at the low. During August, the heat index is computed to be 84.2°F (29°C). Weather in August »

Weather in September

September, the first month of the autumn in Chattaroy, is still a pleasant month, with an average temperature ranging between max 72.7°F (22.6°C) and min 46.6°F (8.1°C). A shift in the average high-temperature occurs in September, reducing from a warm 84°F (28.9°C) in August to an agreeable 72.7°F (22.6°C). Weather in September »

Weather in October

October, the same as September, in Chattaroy, Washington, is a moderate autumn month, with an average temperature varying between 36.7°F (2.6°C) and 55.8°F (13.2°C). A clear decrease in the average high-temperature is observed during October, decreasing from a pleasant 72.7°F (22.6°C) in September to a mild 55.8°F (13.2°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a wintry month in Chattaroy, Washington, with an average temperature fluctuating between 40.5°F (4.7°C) and 28.2°F (-2.1°C). November's arrival is marked by a notable drop in high-temperatures, falling from a mild 55.8°F (13.2°C) in October to a cold 40.5°F (4.7°C). Weather in November »

Weather in December

December, the first month of the winter in Chattaroy, is also a subzero cold month, with an average temperature fluctuating between 31.3°F (-0.4°C) and 20.3°F (-6.5°C). In Chattaroy, the month of December registers the lowest temperatures, averaging 31.3°F (-0.4°C) at the peak and 20.3°F (-6.5°C) at the lowest. Weather in December »
Updated: Jun 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the most humid month?

With an average relative humidity of 92%, January is the most humid month.

What is the wettest month?

The month with the most rainfall is January, when the rain falls for 8.8 days and typically aggregates up to 2.4" (61mm) of precipitation.

How many days does it rain?

In Chattaroy, during the entire year, the rain falls for 124.9 days and collects up to 17.44" (443mm) of precipitation.

When does it snow?

January through May, September through December are months with snowfall.

What is the snowiest month?

January is the month with the most snowfall. Snow falls for 16 days and accumulates 13.23" (336mm) of snow.

How many days does it snow?

Throughout the year, there are 69.2 snowfall days, and 42.99" (1092mm) of snow is accumulated.

What is the month with the least sunshine?

January has the least sunshine of the year, with an average of 3.4h of sunshine.

When is the lowest UV index?

The months with the lowest UV index are February, November and December, with an average maximum UV index of 1.

When is Daylight Saving Time (DST) in Chattaroy?

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 Chattaroy, snow does not fall in June through August.

When are the longest days?

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

When is the highest UV index?

The month with the highest UV index is July, with an average maximum UV index of 6.

What is the hottest time of year?

August is the month that records the highest temperatures, with averages ranging from a high of 84°F (28.9°C) to a low of 54.3°F (12.4°C).

What is the least humid month in Chattaroy?

With an average relative humidity of 43%, August is the least humid month.

What is the driest month?

August is the month with the least rainfall. Rain falls for 5.1 days and accumulates 0.31" (8mm) of precipitation.

What month has the most sunshine?

August has the most sunshine of the year, with an average of 12h of sunshine.

What month is the coldest?

December stands out as Chattaroy's coldest month, with temperatures ranging between an average high of 31.3°F (-0.4°C) and a low of 20.3°F (-6.5°C).

What is the month with the shortest days?

With an average of 8h and 30min of daylight, December has the shortest days of the year.

Average temperature
Chattaroy, WA

Average temperature - Chattaroy, WA

The warmest month (with the highest average high temperature) is August (84°F).
The month with the lowest average high temperature is December (31.3°F).

The month with the highest average low temperature is August (54.3°F).
The coldest month (with the lowest average low temperature) is December (20.3°F).

Average pressure
Chattaroy, WA

Average pressure - Chattaroy, WA

The month with the highest atmospheric pressure is January (30.19"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).

Average wind speed
Chattaroy, WA

Average wind speed - Chattaroy, WA

The windiest month (with the highest average wind speed) is April (5.6mph).
The calmest month (with the lowest average wind speed) is December (4mph).

Average humidity
Chattaroy, WA

Average humidity - Chattaroy, WA

The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is August (43%).

Average rainfall
Chattaroy, WA

Average rainfall - Chattaroy, WA

The wettest month (with the highest rainfall) is January (2.4").
The driest month (with the least rainfall) is August (0.31").

Average rainfall days
Chattaroy, WA

Average rainfall days - Chattaroy, WA

The month with the highest number of rainy days is March (16.2 days).
The month with the least rainy days is August (5.1 days).

Average snowfall
Chattaroy, WA

Average snowfall - Chattaroy, WA

The month with the highest snowfall is January (13.23").
The months with the least snowfall are June, July and August (0").

Average snowfall days
Chattaroy, WA

Average snowfall days - Chattaroy, WA

The month with the highest number of snowfall days is December (16.9 days).
The months with the least snowfall days are June, July and August (0 days).

Average daylight / Average sunshine
Chattaroy, WA

Average daylight / Average sunshine - Chattaroy, 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 30min).

The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).

Average sunshine days
Chattaroy, WA

Average sunshine days - Chattaroy, WA

The month with the most sunshine days is July (24.2 days).
The month with the least sunshine days is March (9.7 days).

Average UV index
Chattaroy, WA

Average UV index - Chattaroy, WA

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are February, November and December (UV index 1).

Average visibility
Chattaroy, WA

Average visibility - Chattaroy, WA

The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (3mi).

Chattaroy, Washington, USA

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