Best year time to visit Keystone (historical)

General weather information about Keystone (historical)

Average annual temperature is 13.1 °C

Absolute maximum temperature: 36.2 °C

Absolute minimum temperature: -13.4 °C

Number of sunny days: 201 days

Number of rainy days: 154 days

Number of snow days: 10 days

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Absolute maximum temperature (°C)	11.5	17.1	21.1	27.9	31.6	35.0	35.8	36.2	34.3	30.8	21.5	15.2
Average daytime temperature (°C)	4.7	8.6	10.1	19.2	26.0	29.8	30.1	29.5	27.2	19.3	12.1	8.0
Average temperature (°C)	0.2	1.8	4.6	12.1	19.2	23.7	24.6	24.3	21.4	14.2	6.8	3.8
Average night temperature (°C)	-3.3	-3.0	0.5	6.7	13.3	18.1	20.1	20.3	16.5	10.0	2.7	0.8
Absolute minimum temperature (°C)	-13.0	-13.4	-11.0	-2.4	4.9	11.0	15.4	14.7	12.2	-3.8	-7.4	-4.7

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

The largest precipitation sum in Keystone (historical) is at

April — 101(mm)

June — 106(mm)

October — 130(mm)

December — 113(mm)

When is the best time to visit Keystone (historical)?

The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Keystone (historical).

What is the weather like in Keystone (historical)?

See average temperature, rainfall and daylight hours for Keystone (historical) by month in the table above.

How many sunny days does Keystone (historical) have?

The monthly weather statistics above show sunshine and rainfall patterns for Keystone (historical) throughout the year.