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 (°F)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Max temperature (daytime)	36	46	55	66	75	88	93	90	81	68	52	39
Min temperature (night-time)	14	21	30	37	46	54	61	59	50	39	27	18
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 (inches)	0.6	0.5	0.9	0.7	0.9	0.5	0.7	0.9	0.8	1.0	0.7	0.6

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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 36°F 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.

36
36°F max day temperature
6
6 hours of sunshine per day
6
6 days with some rainfall
14
14°F min night temperature
10
10 hours of daylight per day
0
No heat & humidity
0.6
0.6 inches of monthly rainfall
2
2 (Low) UV index

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Grand Junction weather in February

Expect daytime maximum temperatures of 46°F 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.

46
46°F max day temperature
7
7 hours of sunshine per day
5
5 days with some rainfall
21
21°F min night temperature
11
11 hours of daylight per day
0
No heat & humidity
0.5
0.5 inches of monthly rainfall
3
3 (Moderate) UV index

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Grand Junction weather in March

Expect daytime maximum temperatures of 55°F in Grand Junction, Colorado in March based on long-term weather averages. There are 8 hours of sunshine per day on average.

55
55°F max day temperature
8
8 hours of sunshine per day
8
8 days with some rainfall
30
30°F min night temperature
12
12 hours of daylight per day
0
No heat & humidity
0.9
0.9 inches of monthly rainfall
5
5 (Moderate) UV index

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Grand Junction weather in April

Expect daytime maximum temperatures of 66°F in Grand Junction, Colorado in April based on long-term weather averages. There are 9 hours of sunshine per day on average.

66
66°F max day temperature
9
9 hours of sunshine per day
7
7 days with some rainfall
37
37°F min night temperature
13
13 hours of daylight per day
0
No heat & humidity
0.7
0.7 inches of monthly rainfall
7
7 (High) UV index

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Grand Junction weather in May

Expect daytime maximum temperatures of 75°F in Grand Junction, Colorado in May based on long-term weather averages. There are 11 hours of sunshine per day on average.

75
75°F max day temperature
11
11 hours of sunshine per day
6
6 days with some rainfall
46
46°F min night temperature
14
14 hours of daylight per day
0
No heat & humidity
0.9
0.9 inches of monthly rainfall
9
9 (Very High) UV index

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Grand Junction weather in June

Expect daytime maximum temperatures of 88°F in Grand Junction, Colorado in June based on long-term weather averages. There are 12 hours of sunshine per day on average.

88
88°F max day temperature
12
12 hours of sunshine per day
4
4 days with some rainfall
54
54°F min night temperature
15
15 hours of daylight per day
M
Moderate heat & humidity
0.5
0.5 inches of monthly rainfall
10
10 (Very High) UV index

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Grand Junction weather in July

Expect daytime maximum temperatures of 93°F 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.

93
93°F max day temperature
12
12 hours of sunshine per day
6
6 days with some rainfall
61
61°F min night temperature
15
15 hours of daylight per day
H
High heat & humidity
0.7
0.7 inches of monthly rainfall
11
11 (Extreme) UV index

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Grand Junction weather in August

Expect daytime maximum temperatures of 90°F in Grand Junction, Colorado in August based on long-term weather averages. There are 11 hours of sunshine per day on average.

90
90°F max day temperature
11
11 hours of sunshine per day
6
6 days with some rainfall
59
59°F min night temperature
14
14 hours of daylight per day
M
Moderate heat & humidity
0.9
0.9 inches of monthly rainfall
10
10 (Very High) UV index

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Grand Junction weather in September

Expect daytime maximum temperatures of 81°F in Grand Junction, Colorado in September based on long-term weather averages. There are 10 hours of sunshine per day on average.

81
81°F max day temperature
10
10 hours of sunshine per day
6
6 days with some rainfall
50
50°F min night temperature
12
12 hours of daylight per day
L
Low heat & humidity
0.8
0.8 inches of monthly rainfall
7
7 (High) UV index

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Grand Junction weather in October

Expect daytime maximum temperatures of 68°F in Grand Junction, Colorado in October based on long-term weather averages. There are 8 hours of sunshine per day on average.

68
68°F max day temperature
8
8 hours of sunshine per day
5
5 days with some rainfall
39
39°F min night temperature
11
11 hours of daylight per day
0
No heat & humidity
1.0
1.0 inches of monthly rainfall
5
5 (Moderate) UV index

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Grand Junction weather in November

Expect daytime maximum temperatures of 52°F in Grand Junction, Colorado in November based on long-term weather averages. There are 6 hours of sunshine per day on average.

52
52°F max day temperature
6
6 hours of sunshine per day
6
6 days with some rainfall
27
27°F min night temperature
10
10 hours of daylight per day
0
No heat & humidity
0.7
0.7 inches of monthly rainfall
3
3 (Moderate) UV index

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Grand Junction weather in December

Expect daytime maximum temperatures of 39°F 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.

39
39°F max day temperature
6
6 hours of sunshine per day
6
6 days with some rainfall
18
18°F min night temperature
9
9 hours of daylight per day
0
No heat & humidity
0.6
0.6 inches of monthly rainfall
2
2 (Low) UV index

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