Annual mean 19°C · wettest around January · prevailing wind S
Warmest
37.8 °C
Coldest
12.4 °C
Wettest
53%
Windiest
5.5 m/s
Prevailing
S
4.1 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Fort Irwin over the whole year is 19°C. July is the hottest month, with highs of about 37°C; December is the coldest, with lows of about 3°C. Fort Irwin has no sharply defined rainy season: the chance of rain on a given day runs from 22% in September, the driest month, to 36% in January, the wettest. Winds in Fort Irwin are highest in May, averaging 4.9 m/s (18 km/h), and lightest in December, at 2.6 m/s (9 km/h). The prevailing wind is from the S. The clearest skies in Fort Irwin come in October, when the sky is typically 6% covered; March is the cloudiest month, at 20%.
Month by month Fort Irwin climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
13°C
4°C
8°C
36%
18%
2.9 m/s
10
0
61
February
15°C
5°C
10°C
33%
17%
3.6 m/s
24
0
64
March
18°C
8°C
12°C
31%
20%
4.5 m/s
34
2
68
April
24°C
12°C
18°C
29%
11%
4.7 m/s
63
13
67
May
27°C
16°C
22°C
33%
10%
4.9 m/s
64
37
46
June
34°C
22°C
29°C
26%
7%
4.6 m/s
33
57
14
July
37°C
25°C
33°C
25%
9%
4.1 m/s
11
45
3
August
36°C
23°C
32°C
25%
8%
3.8 m/s
12
56
4
September
32°C
19°C
28°C
22%
7%
3.6 m/s
42
57
19
October
26°C
13°C
21°C
31%
6%
3.2 m/s
69
30
54
November
19°C
6°C
14°C
24%
9%
2.8 m/s
44
3
76
December
14°C
3°C
9°C
31%
16%
2.6 m/s
14
0
66
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Fort Irwin weather by season
Year round, Fort Irwin has days of about 13°C at their warmest in January, its coolest month, and 37°C in July, its warmest; the coolest hours of the day run from 3°C to 25°C through the year, and the average temperature over the year is 19°C around the clock. Rain is most likely around January and least likely around September. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Fort Irwin weather in winterDecember to February
High 14°CLow 4°CRain 33%
Winter in Fort Irwin has typical daily highs of about 14°C and lows of about 4°C, with a 33% chance of rain on a given day.
Fort Irwin weather in springMarch to May
High 23°CLow 12°CRain 31%
Spring in Fort Irwin has typical daily highs of about 23°C and lows of about 12°C, with a 31% chance of rain on a given day.
Fort Irwin weather in summerJune to August
High 36°CLow 24°CRain 25%
Summer in Fort Irwin has typical daily highs of about 36°C and lows of about 24°C, with a 25% chance of rain on a given day.
Fort Irwin weather in autumnSeptember to November
High 25°CLow 13°CRain 26%
Autumn in Fort Irwin has typical daily highs of about 25°C and lows of about 13°C, with a 26% chance of rain on a given day.
When is the rainy season in Fort Irwin?
Fort Irwin has no sharply defined rainy season: the chance of rain on a given day runs from 22% in September, the driest month, to 36% in January, the wettest.
What time of year is Fort Irwin windiest?
Winds in Fort Irwin are highest in May, averaging 4.9 m/s (18 km/h), and lightest in December, at 2.6 m/s (9 km/h). The prevailing wind is from the S.
What is the average temperature in Fort Irwin year round?
The average temperature in Fort Irwin over the whole year is 19°C. July is the hottest month, with highs of about 37°C; December is the coldest, with lows of about 3°C.