Annual mean 12°C · wettest around March · prevailing wind S
Warmest
29.8 °C
Coldest
4.8 °C
Wettest
45%
Windiest
5.5 m/s
Prevailing
S
4.4 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 Flagstaff over the whole year is 12°C. July is the hottest month, with highs of about 29°C; January is the coldest, with lows of about -3°C. Flagstaff has no sharply defined rainy season: the chance of rain on a given day runs from 27% in June, the driest month, to 40% in March, the wettest. Winds in Flagstaff are highest in April, averaging 4.0 m/s (14 km/h), and lightest in August, at 2.9 m/s (10 km/h). The prevailing wind is from the S. The clearest skies in Flagstaff come in June, when the sky is typically 10% covered; March is the cloudiest month, at 32%.
Month by month Flagstaff 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
5°C
-3°C
-0°C
39%
31%
3.1 m/s
1
0
17
February
8°C
-2°C
2°C
39%
28%
3.6 m/s
4
0
26
March
11°C
1°C
5°C
40%
32%
3.8 m/s
8
0
38
April
17°C
4°C
10°C
35%
18%
4.0 m/s
26
1
64
May
21°C
8°C
15°C
36%
17%
3.9 m/s
50
6
72
June
28°C
14°C
22°C
27%
10%
3.7 m/s
70
34
51
July
29°C
17°C
26°C
36%
22%
3.1 m/s
61
55
28
August
28°C
16°C
25°C
36%
24%
2.9 m/s
67
48
36
September
25°C
12°C
21°C
37%
20%
3.1 m/s
71
25
59
October
19°C
6°C
14°C
35%
17%
3.2 m/s
44
5
72
November
12°C
1°C
7°C
36%
17%
3.1 m/s
13
0
48
December
7°C
-2°C
2°C
39%
27%
3.0 m/s
2
0
25
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 Flagstaff weather by season
Year round, Flagstaff has days of about 5°C at their warmest in January, its coolest month, and 29°C in July, its warmest; the coolest hours of the day run from -3°C to 17°C through the year, and the average temperature over the year is 12°C around the clock. Rain is most likely around March and least likely around June. 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.
Flagstaff weather in winterDecember to February
High 7°CLow -3°CRain 39%
Winter in Flagstaff has typical daily highs of about 7°C and lows of about -3°C, with a 39% chance of rain on a given day.
Flagstaff weather in springMarch to May
High 16°CLow 4°CRain 37%
Spring in Flagstaff has typical daily highs of about 16°C and lows of about 4°C, with a 37% chance of rain on a given day.
Flagstaff weather in summerJune to August
High 28°CLow 16°CRain 33%
Summer in Flagstaff has typical daily highs of about 28°C and lows of about 16°C, with a 33% chance of rain on a given day.
Flagstaff weather in autumnSeptember to November
High 19°CLow 6°CRain 36%
Autumn in Flagstaff has typical daily highs of about 19°C and lows of about 6°C, with a 36% chance of rain on a given day.
When is the rainy season in Flagstaff?
Flagstaff has no sharply defined rainy season: the chance of rain on a given day runs from 27% in June, the driest month, to 40% in March, the wettest.
What time of year is Flagstaff windiest?
Winds in Flagstaff are highest in April, averaging 4.0 m/s (14 km/h), and lightest in August, at 2.9 m/s (10 km/h). The prevailing wind is from the S.
What is the average temperature in Flagstaff year round?
The average temperature in Flagstaff over the whole year is 12°C. July is the hottest month, with highs of about 29°C; January is the coldest, with lows of about -3°C.