Best year time to visit Keystone

General weather information about Keystone

Average annual temperature is 7.6 °C

Absolute maximum temperature: 36.0 °C

Absolute minimum temperature: -27.1 °C

Number of sunny days: 176 days

Number of rainy days: 133 days

Number of snow days: 56 days

Look at detailed online map of Keystone

* Weather data for Keystone United States is based on climate observations for 2026 year

Keystone air temperature forecast for each month

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Absolute maximum temperature (°C)	8.7	7.4	10.5	27.5	29.9	30.3	35.9	36.0	29.0	26.2	13.4	9.9
Average daytime temperature (°C)	1.3	2.7	5.2	12.6	22.7	23.6	30.7	28.8	22.4	15.6	7.4	5.5
Average temperature (°C)	-4.5	-4.3	-1.8	4.8	14.3	16.0	21.6	20.3	14.0	7.8	1.5	0.2
Average night temperature (°C)	-9.4	-10.1	-7.3	-1.3	6.5	8.5	11.5	12.3	7.3	2.5	-2.3	-2.7
Absolute minimum temperature (°C)	-27.1	-25.6	-15.9	-6.3	0.9	0.6	6.5	7.4	2.3	-7.2	-8.2	-7.1

Keystone monthly weather indicators

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Daylight maximum duration (h)	9.0	11.0	12.0	14.0	15.0	15.0	15.0	14.0	13.0	11.0	10.0	8.0
Daylight mean duration (h)	9.0	10.3	11.9	13.6	15.1	15.9	15.5	14.2	12.6	10.9	9.4	8.6
Daylight minimum duration (h)	8.0	9.0	11.0	12.0	14.0	15.0	14.0	13.0	11.0	10.0	8.0	8.0
Sunshine mean duration (h)	4.7	5.9	8.0	9.3	11.7	12.1	14.2	11.3	9.3	7.6	5.6	4.0
Precipitation (mm)	30	36	48	33	58	42	0	42	33	24	58	31
Sunny days	14	10	7	11	9	7	29	21	18	19	13	18
Rainy days	6	9	6	11	22	23	2	10	12	10	15	7
Snow days	11	9	18	8	0	0	0	0	0	2	2	6

Keystone - weather forecast by months

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Best time to visit Keystone:

The best time to visit Keystone during the most sunny months:

May — 11.7(h)
June — 12.1(h)
July — 14.2(h)
August — 11.3(h)

Months with the longest average daylight duration in Keystone:

June — 15.9(h)
July — 15.5(h)

The largest precipitation sum in Keystone is at

March — 48(mm)

May — 58(mm)

November — 58(mm)

Weather forecast in the closest to Keystone admin centers