Annual mean 18°C · wettest around March · prevailing wind W
Warmest
36.4 °C
Coldest
12.3 °C
Wettest
48%
Windiest
5.2 m/s
Prevailing
W
4.0 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 Barstow over the whole year is 18°C. July is the hottest month, with highs of about 36°C; December is the coldest, with lows of about 3°C. Barstow has no sharply defined rainy season: the chance of rain on a given day runs from 23% in September, the driest month, to 42% in March, the wettest. Winds in Barstow are highest in May, averaging 4.8 m/s (17 km/h), and lightest in December, at 2.6 m/s (9 km/h). The prevailing wind is from the W. The clearest skies in Barstow come in October, when the sky is typically 7% covered; March is the cloudiest month, at 21%.
Month by month Barstow 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
3°C
8°C
42%
18%
2.9 m/s
12
0
61
February
15°C
4°C
10°C
41%
18%
3.5 m/s
25
1
63
March
17°C
6°C
11°C
42%
21%
4.3 m/s
33
2
66
April
22°C
10°C
17°C
36%
12%
4.7 m/s
60
13
67
May
26°C
15°C
21°C
35%
11%
4.8 m/s
62
33
51
June
32°C
20°C
28°C
25%
7%
4.6 m/s
39
53
21
July
36°C
23°C
32°C
25%
7%
4.1 m/s
16
46
7
August
35°C
21°C
31°C
31%
8%
3.8 m/s
18
54
8
September
31°C
17°C
27°C
23%
9%
3.5 m/s
44
54
23
October
25°C
12°C
21°C
31%
7%
3.1 m/s
66
30
54
November
19°C
6°C
14°C
33%
9%
2.8 m/s
44
4
73
December
14°C
3°C
9°C
40%
16%
2.6 m/s
17
0
64
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 Barstow weather by season
Year round, Barstow has days of about 13°C at their warmest in January, its coolest month, and 36°C in July, its warmest; the coolest hours of the day run from 3°C to 23°C through the year, and the average temperature over the year is 18°C around the clock. Rain is most likely around March 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.
Barstow weather in winterDecember to February
High 14°CLow 4°CRain 41%
Winter in Barstow has typical daily highs of about 14°C and lows of about 4°C, with a 41% chance of rain on a given day.
Barstow weather in springMarch to May
High 22°CLow 10°CRain 38%
Spring in Barstow has typical daily highs of about 22°C and lows of about 10°C, with a 38% chance of rain on a given day.
Barstow weather in summerJune to August
High 34°CLow 21°CRain 27%
Summer in Barstow has typical daily highs of about 34°C and lows of about 21°C, with a 27% chance of rain on a given day.
Barstow weather in autumnSeptember to November
High 25°CLow 11°CRain 29%
Autumn in Barstow has typical daily highs of about 25°C and lows of about 11°C, with a 29% chance of rain on a given day.
When is the rainy season in Barstow?
Barstow has no sharply defined rainy season: the chance of rain on a given day runs from 23% in September, the driest month, to 42% in March, the wettest.
What time of year is Barstow windiest?
Winds in Barstow are highest in May, averaging 4.8 m/s (17 km/h), and lightest in December, at 2.6 m/s (9 km/h). The prevailing wind is from the W.
What is the average temperature in Barstow year round?
The average temperature in Barstow over the whole year is 18°C. July is the hottest month, with highs of about 36°C; December is the coldest, with lows of about 3°C.