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
Rainfall
Sunshine & daylight
UV levels & humidity

Temperature in Grand Junction (°C)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Max temperature (daytime)	2	8	13	19	24	31	34	32	27	20	11	4
Min temperature (night-time)	-10	-6	-1	3	8	12	16	15	10	4	-3	-8
Heat & Humidity	0	0	0	0	0	M	H	M	L	0	0	0

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	6	7	8	9	11	12	12	11	10	8	6	6
Daily hours of daylight	10	11	12	13	14	15	15	14	12	11	10	9
UV Index (Maximum)	2	3	5	7	9	10	11	10	7	5	3	2

Rainfall in Grand Junction

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Number of days with some rain	6	5	8	7	6	4	6	6	6	5	6	6
Average monthly rainfall (mm)	15	13	22	19	22	12	18	22	21	25	18	16

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.

Grand Junction weather in January

Expect daytime maximum temperatures of 2°C in Grand Junction, Colorado in January based on long-term weather averages. There are 6 hours of sunshine per day on average, which might fall as snow.

2
2°C max day temperature
6
6 hours of sunshine per day
6
6 days with some rainfall
-10
-10°C min night temperature
10
10 hours of daylight per day
0
No heat & humidity
15
15 mm of monthly rainfall
2
2 (Low) UV index

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Grand Junction weather in February

Expect daytime maximum temperatures of 8°C in Grand Junction, Colorado in February based on long-term weather averages. There are 7 hours of sunshine per day on average, which might fall as snow.

8
8°C max day temperature
7
7 hours of sunshine per day
5
5 days with some rainfall
-6
-6°C min night temperature
11
11 hours of daylight per day
0
No heat & humidity
13
13 mm of monthly rainfall
3
3 (Moderate) UV index

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Grand Junction weather in March

Expect daytime maximum temperatures of 13°C in Grand Junction, Colorado in March based on long-term weather averages. There are 8 hours of sunshine per day on average.

13
13°C max day temperature
8
8 hours of sunshine per day
8
8 days with some rainfall
-1
-1°C min night temperature
12
12 hours of daylight per day
0
No heat & humidity
22
22 mm of monthly rainfall
5
5 (Moderate) UV index

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Grand Junction weather in April

Expect daytime maximum temperatures of 19°C in Grand Junction, Colorado in April based on long-term weather averages. There are 9 hours of sunshine per day on average.

19
19°C max day temperature
9
9 hours of sunshine per day
7
7 days with some rainfall
3
3°C min night temperature
13
13 hours of daylight per day
0
No heat & humidity
19
19 mm of monthly rainfall
7
7 (High) UV index

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Grand Junction weather in May

Expect daytime maximum temperatures of 24°C in Grand Junction, Colorado in May based on long-term weather averages. There are 11 hours of sunshine per day on average.

24
24°C max day temperature
11
11 hours of sunshine per day
6
6 days with some rainfall
8
8°C min night temperature
14
14 hours of daylight per day
0
No heat & humidity
22
22 mm of monthly rainfall
9
9 (Very High) UV index

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Grand Junction weather in June

Expect daytime maximum temperatures of 31°C in Grand Junction, Colorado in June based on long-term weather averages. There are 12 hours of sunshine per day on average.

31
31°C max day temperature
12
12 hours of sunshine per day
4
4 days with some rainfall
12
12°C min night temperature
15
15 hours of daylight per day
M
Moderate heat & humidity
12
12 mm of monthly rainfall
10
10 (Very High) UV index

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Grand Junction weather in July

Expect daytime maximum temperatures of 34°C in Grand Junction, Colorado in July and high heat and humidity based on long-term weather averages. There are 12 hours of sunshine per day on average.

34
34°C max day temperature
12
12 hours of sunshine per day
6
6 days with some rainfall
16
16°C min night temperature
15
15 hours of daylight per day
H
High heat & humidity
18
18 mm of monthly rainfall
11
11 (Extreme) UV index

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Grand Junction weather in August

Expect daytime maximum temperatures of 32°C in Grand Junction, Colorado in August based on long-term weather averages. There are 11 hours of sunshine per day on average.

32
32°C max day temperature
11
11 hours of sunshine per day
6
6 days with some rainfall
15
15°C min night temperature
14
14 hours of daylight per day
M
Moderate heat & humidity
22
22 mm of monthly rainfall
10
10 (Very High) UV index

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Grand Junction weather in September

Expect daytime maximum temperatures of 27°C in Grand Junction, Colorado in September based on long-term weather averages. There are 10 hours of sunshine per day on average.

27
27°C max day temperature
10
10 hours of sunshine per day
6
6 days with some rainfall
10
10°C min night temperature
12
12 hours of daylight per day
L
Low heat & humidity
21
21 mm of monthly rainfall
7
7 (High) UV index

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Grand Junction weather in October

Expect daytime maximum temperatures of 20°C in Grand Junction, Colorado in October based on long-term weather averages. There are 8 hours of sunshine per day on average.

20
20°C max day temperature
8
8 hours of sunshine per day
5
5 days with some rainfall
4
4°C min night temperature
11
11 hours of daylight per day
0
No heat & humidity
25
25 mm of monthly rainfall
5
5 (Moderate) UV index

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Grand Junction weather in November

Expect daytime maximum temperatures of 11°C in Grand Junction, Colorado in November based on long-term weather averages. There are 6 hours of sunshine per day on average.

11
11°C max day temperature
6
6 hours of sunshine per day
6
6 days with some rainfall
-3
-3°C min night temperature
10
10 hours of daylight per day
0
No heat & humidity
18
18 mm of monthly rainfall
3
3 (Moderate) UV index

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Grand Junction weather in December

Expect daytime maximum temperatures of 4°C in Grand Junction, Colorado in December based on long-term weather averages. There are 6 hours of sunshine per day on average, which might fall as snow.

4
4°C max day temperature
6
6 hours of sunshine per day
6
6 days with some rainfall
-8
-8°C min night temperature
9
9 hours of daylight per day
0
No heat & humidity
16
16 mm of monthly rainfall
2
2 (Low) UV index

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