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7 Days
14 Days
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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Jefferson, CO
Content continues below
May
Average Temperature
High
13°
Feels 12
Low
-2°
Feels -5
Average Precipitation
5 Days
Rain amount
6.5mm
Snow amount
7.2cm
Content continues below
Daily Historical Averages
May 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
13°
18
6°
19
8°
20
9°
21
11°
22
13°
23
16°
24
18°
25
18°
26
18°
27
15°
28
20°
29
17°
30
18°
31
18°
Forecast
Sunday, May 17, 2026
Day
13°
Feels 10
Wind
25 km/h SW
Gust
38 km/h
Humidity
26%
P.O.P
60%
Rain
1-3 mm
Night
1°
Feels -2
Wind
14 km/h E
Gust
21 km/h
Humidity
96%
P.O.P
90%
Snow
<1 cm
Rain
2-4 mm
Historical Averages
May 17
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.