Climate and monthly weather forecast
Fort Irwin, CA

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Weather in January

January in Fort Irwin, California, is a mild winter month, with an average temperature fluctuating between 56.8°F (13.8°C) and 41.2°F (5.1°C). January experiences an average high-temperature of a refreshing 56.8°F (13.8°C), barely different from December's 55°F (12.8°C). Weather in January »

Weather in February

February, the last month of the winter in Fort Irwin, is another refreshing month, with an average temperature fluctuating between 60.4°F (15.8°C) and 43.3°F (6.3°C). Fort Irwin's average high-temperature in February is a still moderate 60.4°F (15.8°C), marking an insignificant difference from the 56.8°F (13.8°C) of January. Weather in February »

Weather in March

March, the first month of the spring in Fort Irwin, is a comfortable month, with temperature in the range of an average low of 48.4°F (9.1°C) and an average high of 66.9°F (19.4°C). With the onset of March, Fort Irwin's weather sees a minor temperature rise, transitioning from a moderate 60.4°F (15.8°C) in February to a still refreshing 66.9°F (19.4°C). Weather in March »

Weather in April

April in Fort Irwin, California, is a moderately hot spring month, with an average temperature ranging between min 52.3°F (11.3°C) and max 73.8°F (23.2°C). As Fort Irwin transitions into April, a marginal rise in the average high-temperature is observed, moving from an enjoyable 66.9°F (19.4°C) in March to a warm 73.8°F (23.2°C). Weather in April »

Weather in May

May, the last month of the spring in Fort Irwin, is also a moderately hot month, with an average temperature fluctuating between 81.3°F (27.4°C) and 58.5°F (14.7°C). The start of May is characterized by a subtle increase in the average high-temperature, transitioning from 73.8°F (23.2°C) in April to a still warm 81.3°F (27.4°C). Weather in May »

Weather in June

June, the first month of the summer in Fort Irwin, is a tropical month, with an average temperature varying between 67.1°F (19.5°C) and 93.4°F (34.1°C). An increase in the average high-temperature marks June, moving from May's warm 81.3°F (27.4°C) to a hot 93.4°F (34.1°C). Weather in June »

Weather in July

July is a sweltering summer month in Fort Irwin, California, with an average temperature ranging between max 98.2°F (36.8°C) and min 74.1°F (23.4°C). With average high temperatures of 98.2°F (36.8°C) and lows of 74.1°F (23.4°C), July is the warmest month. Weather in July »

Weather in August

The last month of the summer, August, is also a sweltering month in Fort Irwin, California, with an average temperature ranging between max 97.3°F (36.3°C) and min 74.7°F (23.7°C). The ushering in of August brings an average high-temperature of a still fiery hot 97.3°F (36.3°C), closely mirroring the 98.2°F (36.8°C) of July. Weather in August »

Weather in September

The first month of the autumn, September, is still a tropical month in Fort Irwin, California, with an average temperature varying between 89.8°F (32.1°C) and 69.1°F (20.6°C). A subtle shift in Fort Irwin's weather is observed as August turns into September, with the average high temperature reducing from a very hot 97.3°F (36.3°C) to a tropical 89.8°F (32.1°C). Weather in September »

Weather in October

October, like September, in Fort Irwin, California, is a moderately hot autumn month, with temperature in the range of an average high of 77°F (25°C) and an average low of 57.6°F (14.2°C). The start of October involves a temperature drop, moving from a tropical 89.8°F (32.1°C) in September to a moderately hot 77°F (25°C). Weather in October »

Weather in November

November, the last month of the autumn in Fort Irwin, is also an enjoyable month, with an average temperature varying between 47.5°F (8.6°C) and 65.3°F (18.5°C). The start of November involves a temperature drop, moving from a warm 77°F (25°C) in October to a comfortable 65.3°F (18.5°C). Weather in November »

Weather in December

The first month of the winter, December, is still a cool month in Fort Irwin, California, with an average temperature ranging between max 55°F (12.8°C) and min 40.1°F (4.5°C). December is the month that records the lowest temperatures, with averages ranging from a high of 55°F (12.8°C) to a low of 40.1°F (4.5°C). Weather in December »
Updated: Feb 9, 2024 | Published by: Weather U.S. | About Us / Weather Forecasting / Data Sources

Frequently asked questions

How much does it rain in Fort Irwin?

In Fort Irwin, during the entire year, the rain falls for 39 days and collects up to 3.27" (83mm) of precipitation.

When does it snow in Fort Irwin?

January is the only month when snow falls in Fort Irwin.

When does it snow the most in Fort Irwin?

January is the month with the most snowfall. Snow falls for 0.3 days and accumulates 0.04" (1mm) of snow.

How many days does it snow in Fort Irwin?

In Fort Irwin, during the entire year, snow falls for 0.6 days and aggregates up to 0.04" (1mm) of snow.

What is the month with the least sunshine in Fort Irwin?

The month with the least sunshine in Fort Irwin, California, is January, with an average of 7.1h of sunshine.

When it does not snow in Fort Irwin?

February through December are months without snowfall.

When is Daylight Saving Time (DST) in Fort Irwin?

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.

What is the driest month in Fort Irwin?

The month with the least rainfall in Fort Irwin is June, when the rain falls for 0.6 days and typically collects 0.04" (1mm) of precipitation.

When are the longest days in Fort Irwin?

The month with the longest days in Fort Irwin is June, with an average of 14h and 30min of daylight.

What are the months with the most sunshine in Fort Irwin?

The months with the most sunshine in Fort Irwin are June through August, with an average of 12.1h of sunshine.

What is the month with the highest UV index in Fort Irwin?

The months with the highest UV index in Fort Irwin, California, are June and July, with an average maximum UV index of 8.

What are the warmest months in Fort Irwin?

Fort Irwin's warmest temperatures are experienced in July, with average high temperatures of 98.2°F (36.8°C) and lows of 74.1°F (23.4°C).

What is the least humid month in Fort Irwin?

The least humid month in Fort Irwin, California, is August, with an average relative humidity of 21%.

What is the month with the lowest UV index in Fort Irwin?

November and December, with an average maximum UV index of 3, are months with the lowest UV index.

What time of the year is the coldest in Fort Irwin?

December is the month that records the lowest temperatures in Fort Irwin, with averages ranging from a high of 55°F (12.8°C) to a low of 40.1°F (4.5°C).

What is the most humid month in Fort Irwin?

With an average relative humidity of 47%, December is the most humid month in Fort Irwin, California.

What is the wettest month in Fort Irwin?

The month with the most rainfall is December, when the rain falls for 4.6 days and typically aggregates up to 0.51" (13mm) of precipitation.

What is the month with the shortest days in Fort Irwin?

The month with the shortest days in Fort Irwin is December, with an average of 9h and 48min of daylight.

Average temperature
Fort Irwin, CA

Average temperature - Fort Irwin, CA

The warmest month (with the highest average high temperature) is July (98.2°F).
The month with the lowest average high temperature is December (55°F).

The month with the highest average low temperature is August (74.7°F).
The coldest month (with the lowest average low temperature) is December (40.1°F).

Average pressure
Fort Irwin, CA

Average pressure - Fort Irwin, CA

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.79"Hg).

Average wind speed
Fort Irwin, CA

Average wind speed - Fort Irwin, CA

The windiest month (with the highest average wind speed) is May (11.7mph).
The calmest month (with the lowest average wind speed) is January (6mph).

Average humidity
Fort Irwin, CA

Average humidity - Fort Irwin, CA

The month with the highest relative humidity is December (47%).
The month with the lowest relative humidity is August (21%).

Average rainfall
Fort Irwin, CA

Average rainfall - Fort Irwin, CA

The wettest month (with the highest rainfall) is December (0.51").
The driest month (with the least rainfall) is June (0.04").

Average rainfall days
Fort Irwin, CA

Average rainfall days - Fort Irwin, CA

The month with the highest number of rainy days is December (4.6 days).
The month with the least rainy days is June (0.6 days).

Average snowfall
Fort Irwin, CA

Average snowfall - Fort Irwin, CA

The month with the highest snowfall is January (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").

Average snowfall days
Fort Irwin, CA

Average snowfall days - Fort Irwin, CA

The months with the highest number of snowfall days are January and December (0.3 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October and November (0 days).

Average daylight / Average sunshine
Fort Irwin, CA

Average daylight / Average sunshine - Fort Irwin, CA

The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).

The months with the most sunshine are June, July and August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 7h and 6min).

Average sunshine days
Fort Irwin, CA

Average sunshine days - Fort Irwin, CA

The month with the most sunshine days is June (29 days).
The month with the least sunshine days is February (23.5 days).

Average UV index
Fort Irwin, CA

Average UV index - Fort Irwin, CA

The months with the highest UV index are June and July (UV index 8).
The months with the lowest UV index are November and December (UV index 3).

Average visibility
Fort Irwin, CA

Average visibility - Fort Irwin, CA

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).

Fort Irwin, California, USA

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