Three Rivers, MI Climate: Temperature & Rain by Month
Annual temperature and rainfall from NOAA NCEI's 1991–2020 normals →; comfort score computed by PlainClimate
30-year climate normals (1991-2020) from Three Rivers's primary NOAA station, THREE RIVERS.
The climate verdict for Three Rivers
Three Rivers, Michigan has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 49°F. Its climate comfort score of 59/100 (moderate) lands mid-pack nationally, exceeding 37% of station-mapped location scores.
- 49°F
- average temperature, NOAA 1991-2020 normal
- 59/100
- comfort score, above 37% of station-mapped location scores
- 39.7"
- annual precipitation · 41" snow
- 170 days
- growing season, frost-free days
Three Rivers: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00208184 · Three Rivers, MI 49°F mean · 39.7" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-MID · SWING-WIDE · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 49°F
- RANK-COOL #2,333
- PHOTO-FINISH ≈ Syracuse Hancock
- PRCP-MID 39.7"
- SWING-WIDE 48°F
- COMF-MID 59/100
- LOAD-HEAT 6,602 HDD
- STN-1 USC00208184
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Syracuse Hancock, NY (+ 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 MI station list.
- Three Rivers (this station) 49°F
- Hot Bloomingdale, MI 49°F
- Near Syracuse Hancock, NY 49°F
- Near Lakeville, IN 49°F
- Cold Kenosha, WI 48°F
Climate Living Index · Three Rivers
Three Rivers: 47/100 · grade D
Three Rivers publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Three Rivers, not an official NOAA rating. Rankings still use Comfort Score 59/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 39.7 in · 4.7 from 35 in | 83/100 · B |
| Normal heat + freeze calendar | 145 calendar days | 50/100 · D |
| Frost-free season | 170 days/year | 42/100 · D |
| Annual temperature balance | 48.5°F · 19.0° from 67.5°F | 34/100 · F |
| Snowfall burden | 41.2 inches/year | 27/100 · F |
Three Rivers · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Three Rivers is a continental Köppen climate: Dfb
Coldest-month mean 23.9°F and warmest-month mean 71.4°F place this station in continental, no dry season, warm summer climates (Dfb). Class Dfb is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: continental, specifically continental, no dry season, warm summer.
- Köppen code
- Dfb
- Group
- Continental
- Warmest month
- 71.4°F
- Coldest month
- 23.9°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 Three Rivers sits across the climate record
Three NOAA fields for Three Rivers's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 34th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- 57th percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Wider than 70%
- Warmest-to-coldest month gap for Three Rivers is large versus 6,861 complete station-years.
How Three Rivers compares across U.S. station-mapped locations
Three Rivers's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
59 37th percentile score exceeds 37% 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%). This entry sits in this band.
- 60–70: 1,236 station-mapped locations (20%). Above this entry.
- 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
Three Rivers's measured station temperature trend
MethodologyAcross 86 complete annual observations from 1930 to 2025, THREE RIVERS warmed at a fitted rate of 0.13°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Three Rivers primary station fitted change +0.13 °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 | 31°F (0°C) | 17°F (-8°C) | 24°F (-5°C) | 2.9" | 15.0" | 28.8 | 0.0 |
| February | 34°F (1°C) | 18°F (-8°C) | 26°F (-3°C) | 2.1" | 9.7" | 26.4 | 0.0 |
| March | 45°F (7°C) | 26°F (-3°C) | 35°F (2°C) | 2.3" | 3.7" | 24.2 | 0.0 |
| April | 58°F (14°C) | 36°F (2°C) | 47°F (8°C) | 3.4" | 0.6" | 11.5 | 0.0 |
| May | 69°F (21°C) | 48°F (9°C) | 59°F (15°C) | 4.4" | 0.0" | 1.1 | 0.6 |
| June | 79°F (26°C) | 57°F (14°C) | 68°F (20°C) | 4.1" | 0.0" | 0.0 | 3.2 |
| July | 82°F (28°C) | 61°F (16°C) | 71°F (22°C) | 4.0" | 0.0" | 0.0 | 5.4 |
| August | 80°F (27°C) | 59°F (15°C) | 70°F (21°C) | 4.0" | 0.0" | 0.0 | 2.6 |
| September | 74°F (23°C) | 51°F (11°C) | 63°F (17°C) | 3.6" | 0.0" | 0.2 | 1.3 |
| October | 61°F (16°C) | 40°F (5°C) | 51°F (10°C) | 3.7" | 0.0" | 6.9 | 0.0 |
| November | 47°F (9°C) | 31°F (-1°C) | 39°F (4°C) | 3.0" | 2.9" | 18.9 | 0.0 |
| December | 36°F (2°C) | 23°F (-5°C) | 29°F (-1°C) | 2.4" | 9.3" | 27.3 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 83°F around July 11, short of 90°F on every date, while 145 dates carry a normal low at or below freezing, the coldest 15°F near January 25.
The freezing stretch
The normal low stays at or below 32°F into April 4, then returns to freezing around November 12, covering 145 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 January 10, when 49% of years recorded at least a hundredth of an inch. The driest is July 26 at 32%. Summed across the calendar, that is about 144 wet dates a year.
The widest day
September 21 carries the biggest normal gap between afternoon and dawn, 24°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Three Rivers.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 15.0"
15.2 days with precipitation
Snow: 9.7"
11.8 days with precipitation
Snow: 3.7"
11.3 days with precipitation
Snow: 0.6"
12.7 days with precipitation
13.4 days with precipitation
11.0 days with precipitation
9.7 days with precipitation
10.7 days with precipitation
9.7 days with precipitation
11.9 days with precipitation
Snow: 2.9"
12.6 days with precipitation
Snow: 9.3"
14.3 days with precipitation
Three Rivers spreads its precipitation across the year
Neither half of the year dominates here: June through August take 30% of the annual total and December through February 18%, with neither reaching the 35% that would mark a distinct wet season. Three Rivers has no dry season to plan around, though it does carry a wide 47.5°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: May averages 4.4" and February 2.1". 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 Three Rivers's precipitation splits across the calendar
About 144 days a year record measurable precipitation here, carrying 39.7" between them, or roughly 0.27 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 Three Rivers
Three Rivers averages 41.2 inches of snowfall a year, with January the snowiest month on the normals, spread across roughly 30 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: 41.2 inches of depth.
- Days recording measurable snow: about 30 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 10% 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 17
50% probability date
Last Spring Freeze
April 30
50% probability date
Growing Season
170 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,602
Higher = more heating needed
Cooling Degree Days
615
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside MI closest to Three Rivers 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 (49°F here).
- Butler, PA 49°F · 0.0°F off
- Decorah, IA 49°F · 0.0°F off
- Fredericktown, OH 49°F · 0.0°F off
- Lakeville, IN 49°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (39.7" here), excluding temperature-peer places.
- La Grange, TX 39.6" · 0.0" off
- Wellsville, NY 39.7" · 0.0" off
- Champaign, IL 39.6" · 0.0" off
- Pittsburgh, PA 39.6" · 0.0" off
Snow and freeze rhythm
When cold and snow define Three Rivers
heating led · moderate · mid swing
Three Rivers's energy balance leans toward cold weather: 6,602 annual heating degree days against 615 for cooling. Its 47.5°F seasonal range still makes the monthly rows more useful than the annual average alone.
Three Rivers's frost-free season lasts about 170 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
-
1. Three Rivers coldest normal
January
Averaging 24°F (-5°C), this month sits below freezing for the month as a whole, not merely overnight.
-
2. Three Rivers typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Three Rivers snow peak
January
Three Rivers averages 41.2 inches of snow a year, with January the snowiest month on the normals.
Questions about Three Rivers's climate
How much snow does Three Rivers get? ▼
How cold does Three Rivers get in winter? ▼
How much energy does heating and cooling require in Three Rivers? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Three Rivers's primary station: THREE RIVERS (USC00208184). 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 2679760). Match rule for Three Rivers: 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 Three Rivers 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.