Fairfield, OH Climate: Temperature & Rain by Month
Pulled from NOAA NCEI 1991–2020 normals →: climate measurements used in PlainClimate's documented score
30-year climate normals (1991-2020) from Fairfield's primary NOAA station, FAIRFIELD.
The climate verdict for Fairfield
Water is the standout signal in Fairfield, Ohio: 45.0 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 54°F. Its climate comfort score of 68/100 (good) lands mid-pack nationally, exceeding 56% of station-mapped location scores.
- 54°F
- annual average temperature (NOAA normal)
- 68/100
- comfort score, above 56% of station-mapped location scores
- 45.0"
- yearly precipitation total
- 186 days
- frost-free days per growing season
Fairfield: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00332651 · Fairfield, OH 54°F mean · 45.0" precip
TEMP-COOL · RANK-MID · PHOTO-FINISH · PRCP-MID · SWING-WIDE · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 54°F
- RANK-MID #3,774
- PHOTO-FINISH ≈ Greensburg
- PRCP-MID 45.0"
- SWING-WIDE 46°F
- COMF-MID 68/100
- LOAD-HEAT 5,233 HDD
- STN-1 USC00332651
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Greensburg, IN (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every OH station list.
- Fairfield (this station) 54°F
- Cold Brookville, IN 54°F
- Hot Hovenweep Natio…, UT 54°F
- Near Greensburg, IN 54°F
- Near Indianapolis Ea…, IN 54°F
Climate Living Index · Fairfield
Fairfield: 59/100 · grade C
Fairfield publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Fairfield, not an official NOAA rating. Rankings still use Comfort Score 68/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 45.0 in · 10.0 from 35 in | 65/100 · C |
| Normal heat + freeze calendar | 125 calendar days | 62/100 · C |
| Annual temperature balance | 53.6°F · 13.9° from 67.5°F | 55/100 · C |
| Frost-free season | 186 days/year | 54/100 · D |
Fairfield · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Fairfield is a continental Köppen climate: Dfa
Coldest-month mean 29.5°F and warmest-month mean 75.9°F place this station in continental, no dry season, hot summer climates (Dfa). Class Dfa is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: continental, specifically continental, no dry season, hot summer.
- Köppen code
- Dfa
- Group
- Continental
- Warmest month
- 75.9°F
- Coldest month
- 29.5°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Fairfield sits across the climate record
Three NOAA fields for Fairfield's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 55th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- 68th percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- 66th percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Fairfield compares across U.S. station-mapped locations
Fairfield's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
68 Top 44% score exceeds 56% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). This entry sits in this band.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Fairfield's measured station temperature trend
MethodologyAcross 31 complete annual observations from 1990 to 2025, FAIRFIELD warmed at a fitted rate of 0.32°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Fairfield primary station fitted change +0.32 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 38°F (3°C) | 21°F (-6°C) | 30°F (-1°C) | 3.4" | 26.0 | 0.0 |
| February | 42°F (6°C) | 23°F (-5°C) | 33°F (0°C) | 3.0" | 22.5 | 0.0 |
| March | 53°F (12°C) | 31°F (-1°C) | 42°F (5°C) | 3.9" | 17.9 | 0.0 |
| April | 66°F (19°C) | 41°F (5°C) | 53°F (12°C) | 4.9" | 5.1 | 0.0 |
| May | 75°F (24°C) | 52°F (11°C) | 64°F (18°C) | 4.9" | 0.2 | 1.2 |
| June | 84°F (29°C) | 61°F (16°C) | 72°F (22°C) | 4.4" | 0.0 | 6.9 |
| July | 87°F (31°C) | 65°F (18°C) | 76°F (24°C) | 3.9" | 0.0 | 12.9 |
| August | 87°F (30°C) | 63°F (17°C) | 75°F (24°C) | 3.5" | 0.0 | 10.6 |
| September | 80°F (27°C) | 55°F (13°C) | 68°F (20°C) | 3.3" | 0.0 | 4.4 |
| October | 67°F (20°C) | 43°F (6°C) | 55°F (13°C) | 3.3" | 3.3 | 0.3 |
| November | 54°F (12°C) | 33°F (0°C) | 43°F (6°C) | 3.2" | 15.5 | 0.0 |
| December | 43°F (6°C) | 26°F (-3°C) | 34°F (1°C) | 3.5" | 23.1 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 88°F around July 15, short of 90°F on every date, while 125 dates carry a normal low at or below freezing, the coldest 20°F near January 22.
The freezing stretch
The normal low stays at or below 32°F into March 20, then returns to freezing around November 17, covering 125 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
Where the wet dates fall
The likeliest wet date is May 2, when 39% of years recorded at least a hundredth of an inch. The driest is September 15 at 22%. Summed across the calendar, that is about 109 wet dates a year.
The widest day
April 15 carries the biggest normal gap between afternoon and dawn, 25°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Fairfield.
Monthly Precipitation
Average monthly rainfall
9.2 days with precipitation
7.8 days with precipitation
10.2 days with precipitation
11.3 days with precipitation
11.8 days with precipitation
10.4 days with precipitation
8.9 days with precipitation
7.3 days with precipitation
6.7 days with precipitation
8.0 days with precipitation
8.3 days with precipitation
9.0 days with precipitation
Fairfield spreads its precipitation across the year
Neither half of the year dominates here: June through August take 26% of the annual total and December through February 22%, with neither reaching the 35% that would mark a distinct wet season. Fairfield has no dry season to plan around, though it does carry a wide 46.4°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: April averages 4.9" and February 3.0". The three wettest months together take 32% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
When it rains in Fairfield, it arrives in quantity
45.0" of precipitation falls across only about 109 wet days here, averaging 0.41 inches each. Fewer days carry more water: the year's total is delivered in comparatively heavy events rather than persistent damp.
- Days with measurable precipitation
- about 109 a year, 30% of all days
- Average depth per wet day
- 0.41 inches
- Most wet days
- May, about 12
- Fewest wet days
- September, about 7
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, and a per-day average is not a forecast of any individual storm.
Frost Dates & Growing Season
First Fall Freeze
October 22
50% probability date
Last Spring Freeze
April 19
50% probability date
Growing Season
186 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
5,233
Higher = more heating needed
Cooling Degree Days
1,118
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside OH closest to Fairfield on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (54°F here).
- Bonner Springs, KS 54°F · 0.0°F off
- Brookfield, MO 54°F · 0.0°F off
- Capitan, NM 54°F · 0.0°F off
- Fairmont, WV 54°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (45.0" here), excluding temperature-peer places.
- Columbus, TX 45.0" · 0.0" off
- Kingsport, TN 45.0" · 0.0" off
- Mattituck, NY 45.0" · 0.0" off
- Upper Marlboro, MD 45.0" · 0.0" off
Data-derived climate profile
How Fairfield's climate pattern fits together
heating led · wet · mid swing
Fairfield's energy balance leans toward cold weather: 5,233 annual heating degree days against 1,118 for cooling. Its 46.4°F seasonal range still makes the monthly rows more useful than the annual average alone.
Fairfield's frost-free season lasts about 186 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
July and January mark the typical warm and cold ends of the calendar in Fairfield's middle-range seasonal profile. The measured spread is 46.4°F. The annual average is 54°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Alongside its heating load, Fairfield carries 45.0 inches of precipitation in a normal year, inside PlainClimate's wet range. Snowfall is not added to the interpretation because its annual value is missing. That distinction matters because a wet annual total can arrive as rain, snow, or a mixture at different times.
These labels group NOAA 1991-2020 normals from Fairfield's primary station, so the winter figures are a thirty-year average and not a floor: a single hard season can run well below them. Treat each band as a descriptive range for Fairfield, not an official NOAA class or a year-ahead forecast.
Questions about Fairfield's climate
How much rain does Fairfield get? ▼
How many days above 90°F does Fairfield get? ▼
How much energy does heating and cooling require in Fairfield? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Fairfield's primary station: FAIRFIELD (USC00332651). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as an incorporated place (GEOID 3925970). Match rule for Fairfield: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Fairfield comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.