Weather in Washington County in May

General weather information about Washington County

Average annual temperature is 16.3 °C

Absolute maximum temperature: 39.9 °C

Absolute minimum temperature: -8.4 °C

Number of sunny days: 221 days

Number of rainy days: 143 days

Number of snow days: 1 day

Look at detailed online map of Washington County

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

Washington County air temperature forecast for each month

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Absolute maximum temperature (°C)	19.6	22.0	26.4	28.3	32.7	38.8	38.5	39.9	36.9	31.5	26.0	20.6
Average daytime temperature (°C)	10.5	12.6	15.3	21.7	26.6	31.9	34.0	34.2	30.4	22.3	16.1	12.1
Average temperature (°C)	4.7	5.8	9.3	15.0	20.4	25.7	27.8	28.2	24.2	16.9	10.2	6.9
Average night temperature (°C)	0.5	1.0	4.6	9.1	15.0	20.1	22.6	23.0	19.0	12.4	5.4	3.0
Absolute minimum temperature (°C)	-8.4	-7.3	-5.9	3.0	6.0	16.1	17.3	16.9	15.2	-0.8	-4.5	-3.2

Washington County monthly weather indicators

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Daylight maximum duration (h)	10.0	11.0	12.0	13.0	14.0	14.0	14.0	14.0	12.0	11.0	10.0	9.0
Daylight mean duration (h)	10.0	10.8	12.0	13.1	14.1	14.6	14.4	13.5	12.4	11.3	10.2	9.7
Daylight minimum duration (h)	9.0	10.0	11.0	12.0	13.0	14.0	14.0	13.0	11.0	10.0	9.0	9.0
Sunshine mean duration (h)	6.2	7.0	7.3	9.8	10.2	12.3	11.6	12.0	10.1	7.9	7.5	6.0
Precipitation (mm)	37	89	99	53	88	70	111	29	44	106	40	69
Sunny days	22	17	16	17	13	14	16	23	20	19	24	20
Rainy days	9	11	15	13	18	16	15	8	10	12	6	10
Snow days	0	0	0	0	0	0	0	0	0	0	0	1

Washington County - weather forecast by months

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Best time to visit Washington County:

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

June — 12.3(h)
July — 11.6(h)
August — 12.0(h)

The largest precipitation sum in Washington County is at

February — 89(mm)

March — 99(mm)

May — 88(mm)

July — 111(mm)

October — 106(mm)

Weather forecast in the closest to Washington County admin centers