Hamilton, MO Climate: Temperature & Rain by Month
Temperature and precipitation from NOAA NCEI 1991–2020 normals →, plus PlainClimate's derived comfort score
30-year climate normals (1991-2020) from Hamilton's primary NOAA station, HAMILTON 2W.
The climate verdict for Hamilton
Hamilton, Missouri has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 52°F. Its climate comfort score of 64/100 (good) lands mid-pack nationally, exceeding 49% of station-mapped location scores.
- 52°F
- average temperature, NOAA 1991-2020 normal
- 64/100
- comfort score, above 49% of station-mapped location scores
- 39.9"
- annual precipitation · 8" snow
- 177 days
- frost-free growing season
Hamilton: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00233568 · Hamilton, MO 52°F mean · 39.9" precip
TEMP-COOL · RANK-MID · PHOTO-FINISH · PRCP-MID · SWING-WIDE · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 52°F
- RANK-MID #3,362
- PHOTO-FINISH ≈ Tooele
- PRCP-MID 39.9"
- SWING-WIDE 51°F
- COMF-MID 64/100
- LOAD-HEAT 5,790 HDD
- STN-1 USC00233568
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Tooele, UT (+ 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 MO station list.
- Hamilton (this station) 52°F
- Hot Ordway, CO 52°F
- Near Tooele, UT 52°F
- Near Frankfort, KS 52°F
- Near Keokuk Lock Dam, IA 52°F
Climate Living Index · Hamilton
Hamilton: 59/100 · grade C
Hamilton publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Hamilton, not an official NOAA rating. Rankings still use Comfort Score 64/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 39.9 in · 4.9 from 35 in | 82/100 · B |
| Snowfall burden | 7.6 inches/year | 67/100 · C |
| Normal heat + freeze calendar | 132 calendar days | 58/100 · C |
| Annual temperature balance | 52.0°F · 15.5° from 67.5°F | 49/100 · D |
| Frost-free season | 177 days/year | 48/100 · D |
Hamilton · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Hamilton is a continental Köppen climate: Dfa
Coldest-month mean 25.4°F and warmest-month mean 76.4°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
- 76.4°F
- Coldest month
- 25.4°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 Hamilton sits across the climate record
Three NOAA fields for Hamilton's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 49th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- 58th percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Wider than 84%
- Warmest-to-coldest month gap for Hamilton is large versus 6,861 complete station-years.
How Hamilton compares across U.S. station-mapped locations
Hamilton'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
Hamilton's measured station temperature trend
MethodologyAcross 46 complete annual observations from 1957 to 2017, HAMILTON 2W warmed at a fitted rate of 0.17°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Hamilton primary station fitted change +0.17 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 35°F (2°C) | 16°F (-9°C) | 25°F (-4°C) | 1.1" | 2.9" | 29.5 | 0.0 |
| February | 40°F (5°C) | 20°F (-7°C) | 30°F (-1°C) | 1.6" | 1.5" | 25.5 | 0.0 |
| March | 52°F (11°C) | 30°F (-1°C) | 41°F (5°C) | 2.8" | 1.0" | 21.1 | 0.0 |
| April | 63°F (17°C) | 40°F (5°C) | 52°F (11°C) | 4.0" | 0.1" | 8.8 | 0.0 |
| May | 73°F (23°C) | 52°F (11°C) | 62°F (17°C) | 5.8" | 0.0" | 1.0 | 0.5 |
| June | 82°F (28°C) | 62°F (17°C) | 72°F (22°C) | 5.0" | 0.0" | 0.0 | 4.8 |
| July | 87°F (30°C) | 66°F (19°C) | 76°F (25°C) | 3.9" | 0.0" | 0.0 | 11.5 |
| August | 86°F (30°C) | 64°F (18°C) | 75°F (24°C) | 4.3" | 0.0" | 0.0 | 9.4 |
| September | 78°F (26°C) | 54°F (12°C) | 66°F (19°C) | 4.3" | 0.0" | 0.6 | 2.5 |
| October | 66°F (19°C) | 42°F (5°C) | 54°F (12°C) | 3.3" | 0.0" | 7.1 | 0.1 |
| November | 52°F (11°C) | 30°F (-1°C) | 41°F (5°C) | 2.3" | 0.5" | 19.0 | 0.0 |
| December | 40°F (4°C) | 20°F (-7°C) | 30°F (-1°C) | 1.7" | 1.6" | 28.6 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 87°F around July 24, short of 90°F on every date, while 132 dates carry a normal low at or below freezing, the coldest 15°F near January 15.
The freezing stretch
The normal low stays at or below 32°F into March 21, then returns to freezing around November 11, covering 132 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 3, when 37% of years recorded at least a hundredth of an inch. The driest is January 24 at 18%. Summed across the calendar, that is about 95 wet dates a year.
The widest day
September 28 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 Hamilton.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 2.9"
5.8 days with precipitation
Snow: 1.5"
5.7 days with precipitation
Snow: 1.0"
7.9 days with precipitation
Snow: 0.1"
10.1 days with precipitation
11.3 days with precipitation
9.8 days with precipitation
8.2 days with precipitation
8.1 days with precipitation
7.7 days with precipitation
8.1 days with precipitation
Snow: 0.5"
6.4 days with precipitation
Snow: 1.6"
6.0 days with precipitation
Hamilton spreads its precipitation across the year
Neither half of the year dominates here: June through August take 33% of the annual total and December through February 11%, with neither reaching the 35% that would mark a distinct wet season. Hamilton has no dry season to plan around, though it does carry a wide 51°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: May averages 5.8" and January 1.1". The three wettest months together take 38% 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 Hamilton, it arrives in quantity
39.9" of precipitation falls across only about 95 wet days here, averaging 0.42 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 95 a year, 26% of all days
- Average depth per wet day
- 0.42 inches
- Most wet days
- May, about 11
- Fewest wet days
- February, about 6
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.
Snow reaches Hamilton, but rarely amounts to much
The normals record 7.6 inches of snow a year here, most likely in January. That is a real but marginal amount: enough that snow is part of the local record, not enough to define the winter.
A figure in this range usually reflects a handful of events that melt quickly rather than a season of accumulation; about 4 days a year record any measurable snow at all.
NOAA 1991-2020 normals. An average across thirty years can smooth away a single heavy winter, so a small annual figure does not mean a significant snowfall is impossible.
Frost Dates & Growing Season
First Fall Freeze
October 17
50% probability date
Last Spring Freeze
April 23
50% probability date
Growing Season
177 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
5,790
Higher = more heating needed
Cooling Degree Days
1,101
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside MO closest to Hamilton 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 (52°F here).
- Arapahoe, CO 52°F · 0.0°F off
- Athens, IL 52°F · 0.0°F off
- Congerville, IL 52°F · 0.0°F off
- Farmington, UT 52°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (39.9" here), excluding temperature-peer places.
- Malone, NY 39.9" · 0.0" off
- Portland, IN 39.9" · 0.0" off
- Graton, CA 39.9" · 0.0" off
- Wheaton, IL 39.9" · 0.0" off
Data-derived climate profile
How Hamilton's climate pattern fits together
heating led · moderate · mid swing
Hamilton's energy balance leans toward cold weather: 5,790 annual heating degree days against 1,101 for cooling. Its 51.0°F seasonal range still makes the monthly rows more useful than the annual average alone.
Hamilton's frost-free season lasts about 177 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 Hamilton's middle-range seasonal profile. The measured spread is 51.0°F. The annual average is 52°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Hamilton's 39.9 inches of annual precipitation falls in PlainClimate's middle band, so “wet” or “dry” is not the leading description. Annual snowfall totals 7.6 inches. Temperature balance and the calendar distribution carry more information than the annual moisture label alone.
These labels group NOAA 1991-2020 normals from Hamilton'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 Hamilton, not an official NOAA class or a year-ahead forecast.
Questions about Hamilton's climate
How much rain does Hamilton get? ▼
How cold does Hamilton get in winter? ▼
How much energy does heating and cooling require in Hamilton? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Hamilton's primary station: HAMILTON 2W (USC00233568). 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 2930034). Match rule for Hamilton: 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 Hamilton 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.