Waterloo, OH Climate: Temperature & Rain by Month
Explore NOAA NCEI's 1991–2020 climate normals → and a clearly labeled PlainClimate comfort calculation
30-year climate normals (1991-2020) from Waterloo's primary NOAA station, WATERLOO.
The climate verdict for Waterloo
Water is the standout signal in Waterloo, Ohio: 45.7 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 53°F. Its climate comfort score of 64/100 (good) lands mid-pack nationally, exceeding 49% of station-mapped location scores.
- 53°F
- annual average temperature (NOAA normal)
- 64/100
- comfort score, above 49% of station-mapped location scores
- 45.7"
- annual precipitation · 14" snow
- 168 days
- frost-free days per growing season
Waterloo: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00338810 · Waterloo, OH 53°F mean · 45.7" precip
TEMP-COOL · RANK-MID · PHOTO-FINISH · PRCP-MID · SWING-MID · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 53°F
- RANK-MID #3,568
- PHOTO-FINISH ≈ Eisenhower Nhs
- PRCP-MID 45.7"
- SWING-MID 43°F
- COMF-MID 64/100
- LOAD-HEAT 5,275 HDD
- STN-1 USC00338810
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Eisenhower Nhs, PA (+ 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.
- Waterloo (this station) 53°F
- Hot Sharpsburg, MD 53°F
- Near Eisenhower Nhs, PA 53°F
- Near Trinidad Perry…, CO 53°F
- Near Tiverton, RI 53°F
Climate Living Index · Waterloo
Waterloo: 53/100 · grade D
Waterloo publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Waterloo, not an official NOAA rating. Rankings still use Comfort Score 64/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 45.7 in · 10.7 from 35 in | 62/100 · C |
| Snowfall burden | 13.6 inches/year | 58/100 · C |
| Annual temperature balance | 52.8°F · 14.7° from 67.5°F | 52/100 · D |
| Normal heat + freeze calendar | 144 calendar days | 51/100 · D |
| Frost-free season | 168 days/year | 40/100 · D |
Waterloo · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Waterloo is a continental Köppen climate: Dfa
Coldest-month mean 30.7°F and warmest-month mean 74.0°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
- 74.0°F
- Coldest month
- 30.7°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 Waterloo sits across the climate record
Three NOAA fields for Waterloo's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 52nd percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Top 30% wettest
- Waterloo's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- 50th percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Waterloo compares across U.S. station-mapped locations
Waterloo's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
64 49th percentile score exceeds 49% 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
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 41°F (5°C) | 20°F (-6°C) | 31°F (-1°C) | 3.3" | 5.0" | 26.1 | 0.0 |
| February | 45°F (7°C) | 22°F (-5°C) | 34°F (1°C) | 3.1" | 3.9" | 23.8 | 0.0 |
| March | 54°F (12°C) | 29°F (-2°C) | 42°F (5°C) | 4.2" | 2.2" | 20.4 | 0.0 |
| April | 67°F (19°C) | 38°F (3°C) | 52°F (11°C) | 3.7" | 0.1" | 9.1 | 0.1 |
| May | 75°F (24°C) | 49°F (9°C) | 62°F (17°C) | 4.5" | 0.0" | 1.4 | 0.8 |
| June | 83°F (28°C) | 58°F (14°C) | 70°F (21°C) | 4.0" | 0.0" | 0.0 | 5.1 |
| July | 86°F (30°C) | 62°F (17°C) | 74°F (23°C) | 5.6" | 0.0" | 0.0 | 9.5 |
| August | 85°F (30°C) | 60°F (16°C) | 73°F (23°C) | 3.7" | 0.0" | 0.0 | 7.1 |
| September | 79°F (26°C) | 52°F (11°C) | 66°F (19°C) | 3.9" | 0.0" | 0.0 | 3.7 |
| October | 68°F (20°C) | 40°F (4°C) | 54°F (12°C) | 3.1" | 0.0" | 6.6 | 0.3 |
| November | 55°F (13°C) | 30°F (-1°C) | 43°F (6°C) | 2.9" | 0.4" | 20.0 | 0.0 |
| December | 46°F (8°C) | 25°F (-4°C) | 35°F (2°C) | 3.7" | 2.0" | 24.1 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 86°F around July 11, short of 90°F on every date, while 144 dates carry a normal low at or below freezing, the coldest 19°F near January 22.
The freezing stretch
The normal low stays at or below 32°F into March 28, then returns to freezing around November 6, covering 144 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 16, when 48% of years recorded at least a hundredth of an inch. The driest is October 3 at 32%. Summed across the calendar, that is about 147 wet dates a year.
The widest day
April 15 carries the biggest normal gap between afternoon and dawn, 30°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Waterloo.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 5.0"
12.7 days with precipitation
Snow: 3.9"
12.5 days with precipitation
Snow: 2.2"
13.4 days with precipitation
Snow: 0.1"
13.1 days with precipitation
14.9 days with precipitation
13.4 days with precipitation
12.2 days with precipitation
11.1 days with precipitation
10.4 days with precipitation
9.7 days with precipitation
Snow: 0.4"
10.1 days with precipitation
Snow: 2.0"
13.0 days with precipitation
Waterloo spreads its precipitation across the year
Neither half of the year dominates here: June through August take 29% of the annual total and December through February 22%, with neither reaching the 35% that would mark a distinct wet season. Waterloo has no dry season to plan around, though it does carry a 43.3°F seasonal spread.
The gap between the wettest and driest month still matters: July averages 5.6" and November 2.9". The three wettest months together take 31% 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.
How Waterloo's precipitation splits across the calendar
About 147 days a year record measurable precipitation here, carrying 45.7" between them, or roughly 0.31 inches on a typical wet day. That sits in the middle band: neither the many-light-days pattern of the Pacific Northwest and the Great Lakes, nor the few-heavy-events pattern of the Gulf and the desert Southwest.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year and say nothing about the heaviest single storm on record.
Winter brings real snow to Waterloo
Waterloo averages 13.6 inches of snowfall a year, with January the snowiest month on the normals, spread across roughly 11 days that record measurable snow. That is depth accumulating on the ground, which is why it can exceed the annual precipitation figure: precipitation counts the liquid the snow melts down to, and fresh snow is mostly air.
- Annual snowfall: 13.6 inches of depth.
- Days recording measurable snow: about 11 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 3% of the year's precipitation.
NOAA 1991-2020 normals. The ten-to-one ratio is a convention, not a measurement: real ratios vary with temperature, so treat the share as an order of magnitude rather than an exact split.
Frost Dates & Growing Season
First Fall Freeze
October 15
50% probability date
Last Spring Freeze
April 30
50% probability date
Growing Season
168 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
5,275
Higher = more heating needed
Cooling Degree Days
873
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside OH closest to Waterloo 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 (53°F here).
- Alderson, WV 53°F · 0.0°F off
- Anacortes, WA 53°F · 0.0°F off
- Bentley, IL 53°F · 0.0°F off
- Biglerville, PA 53°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (45.7" here), excluding temperature-peer places.
- Atoka, OK 45.7" · 0.0" off
- Roanoke, VA 45.7" · 0.0" off
- Surrency, GA 45.7" · 0.0" off
- Marshfield, MO 45.6" · 0.0" off
Snow and freeze rhythm
When cold and snow define Waterloo
heating led · wet · mid swing
Waterloo's energy balance leans toward cold weather: 5,275 annual heating degree days against 873 for cooling. Its 43.3°F seasonal range still makes the monthly rows more useful than the annual average alone.
Waterloo's frost-free season lasts about 168 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
-
1. Waterloo coldest normal
January
The monthly mean of 31°F (-1°C) sits near freezing, so cold nights and above-freezing afternoons share the same month.
-
2. Waterloo typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Waterloo snow peak
January
Waterloo averages 13.6 inches of snow a year, with January the snowiest month on the normals.
Questions about Waterloo's climate
How much snow does Waterloo get? ▼
How cold does Waterloo get in winter? ▼
How much energy does heating and cooling require in Waterloo? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Waterloo's primary station: WATERLOO (USC00338810). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for Waterloo; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for Waterloo 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.