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7 Days
14 Days
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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Saint Marys, CO
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May
Average Temperature
High
9°
Feels 7
Low
-1°
Feels -6
Average Precipitation
15 Days
Rain amount
383.7mm
Snow amount
298cm
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
18
0°
19
-2°
20
4°
21
7°
22
7°
23
10°
24
14°
25
15°
26
14°
27
13°
28
14°
29
14°
30
14°
31
15°
Forecast
Monday, May 18, 2026
Day
0°
Feels -2
Wind
15 km/h E
Gust
23 km/h
Humidity
84%
P.O.P
90%
Snow
~10 cm
Night
-8°
Feels -13
Wind
11 km/h S
Gust
17 km/h
Humidity
98%
P.O.P
80%
Snow
~1 cm
Historical Averages
May 18
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.