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Fond du Lac, Wisconsin climate

Dfa Hot-summer humid continental

Fond du Lac has a strongly seasonal cool-temperate climate (Hot-summer humid continental, Köppen Dfa). The hottest month is July with an average daily high near 82°F, while the coldest is January averaging around 12°F at night. Around 32 inches of precipitation falls each year, peaking in June (4.5 inches) and easing off in February (1.2 inches).

☀️ Summers

Warm

Highs near 82°F in July.

About 7 days a year above 90 °F

❄️ Winters

Very cold

Lows near 12°F in January.

About 136 freezing nights a year

🌧️ Rain

Moderate rainfall

About 32 in of rain a year.

Wettest in June

⛅ Sky & trend

Partly cloudy

A roughly even mix of sun and cloud.

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Clear vs cloudy days

Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day counts

Fond du Lac climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	26	31	42	56	68	78	82	79	72	59	44	32
Avg temp (°F)	19	23	33	46	58	68	73	70	62	51	37	25
Avg low (°F)	12	15	25	36	48	58	63	62	53	42	30	18
Precipitation (in)	1.4	1.3	1.9	3.2	3.6	4.5	3.8	3.5	3.0	2.8	1.9	1.5

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°F)	26	31	42	56	68	78
Avg temp (°F)	19	23	33	46	58	68
Avg low (°F)	12	15	25	36	48	58
Precipitation (in)	1.4	1.3	1.9	3.2	3.6	4.5

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	82	79	72	59	44	32
Avg temp (°F)	73	70	62	51	37	25
Avg low (°F)	63	62	53	42	30	18
Precipitation (in)	3.8	3.5	3.0	2.8	1.9	1.5

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	7	9	8	11	11	11	10	9	9	10	9	8
Days with high ≥ 90°F (days)	—	—	—	—	0.6	2	3	0.9	0.4	—	—	—
Days with low ≤ 32°F (days)	27	27	23	10	0.7	—	—	—	—	5	18	25
Days with snowfall ≥ 1 in (days)	3	5	2	1	—	—	—	—	—	0.2	0.6	2

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	7	9	8	11	11	11
Days with high ≥ 90°F (days)	—	—	—	—	0.6	2
Days with low ≤ 32°F (days)	27	27	23	10	0.7	—
Days with snowfall ≥ 1 in (days)	3	5	2	1	—	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	10	9	9	10	9	8
Days with high ≥ 90°F (days)	3	0.9	0.4	—	—	—
Days with low ≤ 32°F (days)	—	—	—	5	18	25
Days with snowfall ≥ 1 in (days)	—	—	—	0.2	0.6	2

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	66	64	65	66	65	60	52	54	53	64	67	67
Clear days (≤ 30% cloud)	4	4	5	5	5	6	8	9	9	6	4	5
Partly cloudy days (30–70%)	11	11	11	9	11	11	14	12	10	9	9	9
Cloudy days (≥ 70%)	16	13	16	16	15	13	10	11	11	16	16	17
Relative humidity (%)	91	88	80	76	76	76	74	74	75	77	82	89
Wind speed (mph)	8.7	9.1	8.6	8.6	7.4	6.3	5.8	5.6	6.5	7.4	7.7	7.8

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	66	64	65	66	65	60
Clear days (≤ 30% cloud)	4	4	5	5	5	6
Partly cloudy days (30–70%)	11	11	11	9	11	11
Cloudy days (≥ 70%)	16	13	16	16	15	13
Relative humidity (%)	91	88	80	76	76	76
Wind speed (mph)	8.7	9.1	8.6	8.6	7.4	6.3

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	52	54	53	64	67	67
Clear days (≤ 30% cloud)	8	9	9	6	4	5
Partly cloudy days (30–70%)	14	12	10	9	9	9
Cloudy days (≥ 70%)	10	11	11	16	16	17
Relative humidity (%)	74	74	75	77	82	89
Wind speed (mph)	5.8	5.6	6.5	7.4	7.7	7.8

Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Fond DU Lac 1 SW (NOAA GHCN station USC00472842), about 2 km from the city centre.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →