Grand Junction weather by month

Check out Grand Junction weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature in Grand Junction (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
2°C maximum daytime temperature in January in Grand Junction2
8°C maximum daytime temperature in February in Grand Junction8
13°C maximum daytime temperature in March in Grand Junction13
19°C maximum daytime temperature in April in Grand Junction19
24°C maximum daytime temperature in May in Grand Junction24
31°C maximum daytime temperature in June in Grand Junction31
34°C maximum daytime temperature in July in Grand Junction34
32°C maximum daytime temperature in August in Grand Junction32
27°C maximum daytime temperature in September in Grand Junction27
20°C maximum daytime temperature in October in Grand Junction20
11°C maximum daytime temperature in November in Grand Junction11
4°C maximum daytime temperature in December in Grand Junction4
Min temperature (night-time)
-10°C minimum night-time temperature in January in Grand Junction-10
-6°C minimum night-time temperature in February in Grand Junction-6
-1°C minimum night-time temperature in March in Grand Junction-1
3°C minimum night-time temperature in April in Grand Junction3
8°C minimum night-time temperature in May in Grand Junction8
12°C minimum night-time temperature in June in Grand Junction12
16°C minimum night-time temperature in July in Grand Junction16
15°C minimum night-time temperature in August in Grand Junction15
10°C minimum night-time temperature in September in Grand Junction10
4°C minimum night-time temperature in October in Grand Junction4
-3°C minimum night-time temperature in November in Grand Junction-3
-8°C minimum night-time temperature in December in Grand Junction-8
Heat & Humidity
No heat & humidity in January in Grand Junction0
No heat & humidity in February in Grand Junction0
No heat & humidity in March in Grand Junction0
No heat & humidity in April in Grand Junction0
No heat & humidity in May in Grand Junction0
Moderate heat & humidity in June in Grand JunctionM
High heat & humidity in July in Grand JunctionH
Moderate heat & humidity in August in Grand JunctionM
Low heat & humidity in September in Grand JunctionL
No heat & humidity in October in Grand Junction0
No heat & humidity in November in Grand Junction0
No heat & humidity in December in Grand Junction0

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & Daylight in Grand Junction

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
10 hours of daylight per day in January in Grand Junction10
11 hours of daylight per day in February in Grand Junction11
12 hours of daylight per day in March in Grand Junction12
13 hours of daylight per day in April in Grand Junction13
14 hours of daylight per day in May in Grand Junction14
15 hours of daylight per day in June in Grand Junction15
15 hours of daylight per day in July in Grand Junction15
14 hours of daylight per day in August in Grand Junction14
12 hours of daylight per day in September in Grand Junction12
11 hours of daylight per day in October in Grand Junction11
10 hours of daylight per day in November in Grand Junction10
9 hours of daylight per day in December in Grand Junction9
UV Index (Maximum)
UV (maximum) index 2 (Low) in January in Grand Junction2
UV (maximum) index 3 (Moderate) in February in Grand Junction3
UV (maximum) index 5 (Moderate) in March in Grand Junction5
UV (maximum) index 7 (High) in April in Grand Junction7
UV (maximum) index 9 (Very High) in May in Grand Junction9
UV (maximum) index 10 (Very High) in June in Grand Junction10
UV (maximum) index 11 (Extreme) in July in Grand Junction11
UV (maximum) index 10 (Very High) in August in Grand Junction10
UV (maximum) index 7 (High) in September in Grand Junction7
UV (maximum) index 5 (Moderate) in October in Grand Junction5
UV (maximum) index 3 (Moderate) in November in Grand Junction3
UV (maximum) index 2 (Low) in December in Grand Junction2

Rainfall in Grand Junction

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
6 days with some rainfall in January in Grand Junction6
5 days with some rainfall in February in Grand Junction5
8 days with some rainfall in March in Grand Junction8
7 days with some rainfall in April in Grand Junction7
6 days with some rainfall in May in Grand Junction6
4 days with some rainfall in June in Grand Junction4
6 days with some rainfall in July in Grand Junction6
6 days with some rainfall in August in Grand Junction6
6 days with some rainfall in September in Grand Junction6
5 days with some rainfall in October in Grand Junction5
6 days with some rainfall in November in Grand Junction6
6 days with some rainfall in December in Grand Junction6
Average monthly rainfall (mm)
15 mm monthly rainfall in January in Grand Junction15
13 mm monthly rainfall in February in Grand Junction13
22 mm monthly rainfall in March in Grand Junction22
19 mm monthly rainfall in April in Grand Junction19
22 mm monthly rainfall in May in Grand Junction22
12 mm monthly rainfall in June in Grand Junction12
18 mm monthly rainfall in July in Grand Junction18
22 mm monthly rainfall in August in Grand Junction22
21 mm monthly rainfall in September in Grand Junction21
25 mm monthly rainfall in October in Grand Junction25
18 mm monthly rainfall in November in Grand Junction18
16 mm monthly rainfall in December in Grand Junction16

More about Grand Junction

Grand Junction by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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The climate guide for Colorado (Grand Junction) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

What's the climate like in Grand Junction?

Grand Junction has a cool desert climate with hot summers.

Metric (°C / mm)  |  Imperial (°F / inches)

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More about the USA

Compare Grand Junction with the USA

Below the Grand Junction chart shows average maximum daytime temperature for Grand Junction, Colorado, USA and the USA (Washington).

Maximum daytime temperature (°C)

Grand Junction, Colorado, USA
USA (Washington)
2
5
8
7
13
13
19
19
24
24
31
29
34
31
32
30
27
26
20
20
11
14
4
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C / mm)  |  Imperial (°F / inches)

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