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Fairfield, Ohio climate

Cfa Humid subtropical

Fairfield has a seasonal cool-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is July with an average daily high near 30°C, while the coldest is January averaging around −5°C at night. Precipitation is fairly even year-round, totalling about 1102 mm.

☀️ Summers

Warm

Highs near 30°C in July.

About 27 days a year above 32 °C

❄️ Winters

Cold

Lows near −5°C in January.

About 102 freezing nights a year

🌧️ Rain

Wet

About 1102 mm of rain a year.

Wettest in May

⛅ Sky & trend

Often cloudy

Cloudy skies much of the year.

+0.0 °C vs 50 years ago

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

Fairfield climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	5	7	13	19	24	29	30	30	27	20	13	7
Avg temp (°C)	0	2	7	13	18	22	24	24	20	13	7	2
Avg low (°C)	−5	−4	1	6	12	16	19	18	13	7	1	−2
Precipitation (mm)	73	71	100	111	119	117	112	86	78	77	74	84

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	5	7	13	19	24	29
Avg temp (°C)	0	2	7	13	18	22
Avg low (°C)	−5	−4	1	6	12	16
Precipitation (mm)	73	71	100	111	119	117

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	30	30	27	20	13	7
Avg temp (°C)	24	24	20	13	7	2
Avg low (°C)	19	18	13	7	1	−2
Precipitation (mm)	112	86	78	77	74	84

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	10	10	11	13	14	12	12	9	8	9	10	11
Days with high ≥ 32°C (days)	—	—	—	—	0.6	5	10	8	4	0.2	—	—
Days with low ≤ 0°C (days)	24	21	14	4	0.2	—	—	—	—	2	14	22
Days with snowfall ≥ 2.5 cm (days)	0.6	0.3	0.2	0.0	—	—	—	—	—	0.0	0.0	0.1

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	10	10	11	13	14	12
Days with high ≥ 32°C (days)	—	—	—	—	0.6	5
Days with low ≤ 0°C (days)	24	21	14	4	0.2	—
Days with snowfall ≥ 2.5 cm (days)	0.6	0.3	0.2	0.0	—	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	12	9	8	9	10	11
Days with high ≥ 32°C (days)	10	8	4	0.2	—	—
Days with low ≤ 0°C (days)	—	—	—	2	14	22
Days with snowfall ≥ 2.5 cm (days)	—	—	—	0.0	0.0	0.1

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	74	71	69	66	65	59	53	50	48	57	64	72
Clear days (≤ 30% cloud)	2	3	4	5	5	6	8	9	10	9	6	3
Partly cloudy days (30–70%)	9	9	10	9	10	12	13	12	10	9	9	8
Cloudy days (≥ 70%)	20	17	17	16	16	12	11	9	9	13	15	19
Relative humidity (%)	86	85	81	78	79	78	74	69	67	71	78	85
Wind speed (mph)	2.1	2.1	1.8	1.1	0.7	0.6	0.6	0.6	0.6	0.7	0.9	1.4

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	74	71	69	66	65	59
Clear days (≤ 30% cloud)	2	3	4	5	5	6
Partly cloudy days (30–70%)	9	9	10	9	10	12
Cloudy days (≥ 70%)	20	17	17	16	16	12
Relative humidity (%)	86	85	81	78	79	78
Wind speed (mph)	2.1	2.1	1.8	1.1	0.7	0.6

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	53	50	48	57	64	72
Clear days (≤ 30% cloud)	8	9	10	9	6	3
Partly cloudy days (30–70%)	13	12	10	9	9	8
Cloudy days (≥ 70%)	11	9	9	13	15	19
Relative humidity (%)	74	69	67	71	78	85
Wind speed (mph)	0.6	0.6	0.6	0.7	0.9	1.4

Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Cincinnati Muni AP Lunken Fld (NOAA GHCN station USW00093812), about 29 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 →