Best year time to visit Jefferson County

General weather information about Jefferson County

Average annual temperature is 18.9 °C

Absolute maximum temperature: 38.2 °C

Absolute minimum temperature: -2.3 °C

Number of sunny days: 186 days

Number of rainy days: 179 days

* Weather data for Jefferson County 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)	22.7	28.1	28.9	30.5	33.3	34.4	38.1	38.2	33.7	28.9	26.0	23.5
Average daytime temperature (°C)	16.2	20.0	21.8	24.8	26.5	30.6	34.7	34.4	28.7	24.0	18.7	15.4
Average temperature (°C)	10.8	14.3	15.5	18.4	20.9	24.7	28.5	28.2	23.1	18.4	13.1	10.2
Average night temperature (°C)	6.6	10.0	10.0	13.1	16.2	19.8	23.5	23.3	18.3	13.6	8.8	6.3
Absolute minimum temperature (°C)	-2.3	0.1	-0.7	6.8	9.8	16.4	21.2	20.7	14.1	7.8	-1.1	-1.5

The best time to visit Jefferson County during the most sunny months:

The largest precipitation sum in Jefferson County is at

January — 146(mm)

March — 132(mm)

June — 136(mm)

When is the best time to visit Jefferson County?

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

What is the weather like in Jefferson County?

See average temperature, rainfall and daylight hours for Jefferson County by month in the table above.

How many sunny days does Jefferson County have?

The monthly weather statistics above show sunshine and rainfall patterns for Jefferson County throughout the year.