Rochester, MN 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 Rochester's primary NOAA station, ROCHESTER INTL AP.
The climate verdict for Rochester
Winter sets the terms in Rochester, Minnesota. A pronounced 55.8°F seasonal swing and heating demand above twice the cooling total frame an annual average of 45°F. At 44/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 10% of scores.
- 45°F
- annual average temperature (NOAA normal)
- 44/100
- comfort score, above 10% of station-mapped location scores
- 34.7"
- annual precipitation · 53" snow
- 159 days
- frost-free growing season
Rochester: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USW00014925 · Rochester, MN 45°F mean · 34.7" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-MID · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 45°F
- RANK-COOL #1,235
- PHOTO-FINISH ≈ Upton
- PRCP-MID 34.7"
- SWING-WIDE 56°F
- COMF-LOW 44/100
- LOAD-HEAT 7,856 HDD
- STN-1 USW00014925
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Upton, WY (+ 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 MN station list.
- Rochester (this station) 45°F
- Cold New Hampton, IA 45°F
- Hot Rushford, MN 45°F
- Near Upton, WY 45°F
- Near Hancock, WI 45°F
Rochester sits in Minnesota, the #3 coldest U.S. state at 42.2°F statewide annual average - see all 50 coldest states ranked by NOAA normals
Climate Living Index · Rochester
Rochester: 44/100 · grade D
Rochester publishes all six Living Index dimensions from NOAA annual/seasonal normals · NOAA daily multivariate normals · NOAA hourly normals.
PlainClimate-derived for Rochester, not an official NOAA rating. Rankings still use Comfort Score 44/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 34.7 in · 0.3 from 35 in | 95/100 · A |
| Summer moisture balance | 60.3°F mean dew point | 62/100 · C |
| Normal heat + freeze calendar | 159 calendar days | 40/100 · D |
| Frost-free season | 159 days/year | 33/100 · F |
| Annual temperature balance | 44.8°F · 22.7° from 67.5°F | 19/100 · F |
| Snowfall burden | 53.1 inches/year | 19/100 · F |
Rochester · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Rochester is a continental Köppen climate: Dfb
Coldest-month mean 14.7°F and warmest-month mean 70.5°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
- 70.5°F
- Coldest month
- 14.7°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 Rochester sits across the climate record
Three NOAA fields for Rochester's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 82%
- Among 6,861 stations, Rochester sits in the cooler third of annual means.
- Annual precipitation
- 47th percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Wider than 93%
- Warmest-to-coldest month gap for Rochester is large versus 6,861 complete station-years.
How Rochester compares across U.S. station-mapped locations
Rochester's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
44 10th percentile score exceeds 10% 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%). This entry sits in this band.
- 50–60: 1,329 station-mapped locations (21%). Above this entry.
- 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
Rochester's measured station temperature trend
MethodologyAcross 102 complete annual observations from 1912 to 2025, ROCHESTER INTL AP warmed at a fitted rate of 0.10°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Rochester primary station fitted change +0.10 °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 | 23°F (-5°C) | 7°F (-14°C) | 15°F (-10°C) | 1.0" | 12.2" | 30.7 | 0.0 |
| February | 27°F (-3°C) | 11°F (-12°C) | 19°F (-7°C) | 1.0" | 10.7" | 27.0 | 0.0 |
| March | 40°F (4°C) | 23°F (-5°C) | 32°F (0°C) | 2.0" | 8.6" | 24.4 | 0.0 |
| April | 55°F (13°C) | 35°F (2°C) | 45°F (7°C) | 3.5" | 3.3" | 10.7 | 0.0 |
| May | 68°F (20°C) | 47°F (8°C) | 58°F (14°C) | 4.3" | 0.5" | 1.1 | 0.7 |
| June | 78°F (25°C) | 58°F (14°C) | 68°F (20°C) | 5.3" | 0.0" | 0.0 | 1.5 |
| July | 80°F (27°C) | 61°F (16°C) | 71°F (21°C) | 4.2" | 0.0" | 0.0 | 1.8 |
| August | 78°F (26°C) | 58°F (15°C) | 68°F (20°C) | 4.1" | 0.0" | 0.0 | 0.5 |
| September | 72°F (22°C) | 50°F (10°C) | 61°F (16°C) | 3.6" | 0.0" | 0.6 | 0.4 |
| October | 58°F (14°C) | 38°F (3°C) | 48°F (9°C) | 2.4" | 0.9" | 9.1 | 0.1 |
| November | 42°F (5°C) | 26°F (-4°C) | 34°F (1°C) | 1.8" | 4.5" | 22.7 | 0.0 |
| December | 28°F (-2°C) | 14°F (-10°C) | 21°F (-6°C) | 1.3" | 12.4" | 29.6 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 81°F around July 7, short of 90°F on every date, while 159 dates carry a normal low at or below freezing, the coldest 6°F near January 21.
The freezing stretch
The normal low stays at or below 32°F into April 7, then returns to freezing around November 1, covering 159 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 27, when 44% of years recorded at least a hundredth of an inch. The driest is February 9 at 29%. Summed across the calendar, that is about 124 wet dates a year.
The widest day
September 24 carries the biggest normal gap between afternoon and dawn, 22°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Rochester.
Where Rochester Stands Nationally
Days and nights track unusually close together; the widest normal swing, about 22°F, is narrower than most stations record.
Rochester earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 12.2"
9.4 days with precipitation
Snow: 10.7"
8.0 days with precipitation
Snow: 8.6"
10.2 days with precipitation
Snow: 3.3"
12.2 days with precipitation
Snow: 0.5"
13.3 days with precipitation
12.5 days with precipitation
10.5 days with precipitation
10.0 days with precipitation
9.3 days with precipitation
Snow: 0.9"
9.5 days with precipitation
Snow: 4.5"
9.2 days with precipitation
Snow: 12.4"
9.6 days with precipitation
Rochester runs a summer-peaked wet season
39% of Rochester's yearly precipitation falls in June, July and August alone, against the 25% an evenly spread year would give those three months. The wettest month is June at 5.3", on a wide 55.8°F gap between its warmest and coldest month. Warm-season convection and, across the Southwest, the North American monsoon produce this shape: rain arrives in short heavy bursts during the hottest part of the year rather than as long cool-season soaking.
- Wettest three months: June, May, July, taking 40% of the annual total between them.
- Driest month: January at 1.0".
- Winter share: 9% falls in December, January and February.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. A summer-peaked label means the June-August share reaches 35%; it describes timing across an average year, not any single season, and says nothing about how heavy an individual storm can be.
How Rochester's precipitation splits across the calendar
About 124 days a year record measurable precipitation here, carrying 34.7" between them, or roughly 0.28 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 Rochester
Rochester averages 53.1 inches of snowfall a year, with December the snowiest month on the normals, spread across roughly 38 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: 53.1 inches of depth.
- Days recording measurable snow: about 38 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 15% 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 6
50% probability date
Last Spring Freeze
April 30
50% probability date
Growing Season
159 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
7,856
Higher = more heating needed
Cooling Degree Days
533
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Humidity & Wind
Monthly averages from hourly observations
| Month | Humidity | Wind (mph) | Clear Sky % | Overcast % |
|---|---|---|---|---|
| January | 80% | 12.5 | 45% | 37% |
| February | 77% | 12.6 | 47% | 37% |
| March | 69% | 13.3 | 47% | 32% |
| April | 61% | 12.8 | 49% | 28% |
| May | 67% | 11.0 | 49% | 22% |
| June | 72% | 10.1 | 58% | 13% |
| July | 77% | 8.6 | 59% | 12% |
| August | 77% | 9.2 | 64% | 11% |
| September | 70% | 10.7 | 58% | 22% |
| October | 72% | 12.2 | 51% | 36% |
| November | 79% | 12.7 | 46% | 39% |
| December | 81% | 12.8 | 46% | 40% |
Nationwide similar cities
Other rankable U.S. places outside MN closest to Rochester 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 (45°F here).
- Dannemora, NY 45°F · 0.0°F off
- Estherville, IA 45°F · 0.0°F off
- Hamilton, MT 45°F · 0.0°F off
- Harrison, NE 45°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (34.7" here), excluding temperature-peer places.
- Sheboygan, WI 34.7" · 0.0" off
- Chelsea, MI 34.7" · 0.0" off
- Bellingham, WA 34.7" · 0.0" off
- Hiawatha, KS 34.7" · 0.0" off
Snow and freeze rhythm
When cold and snow define Rochester
heating led · moderate · high swing
Winter and seasonal range jointly define this record. Rochester logs 7,856 heating degree days, more than twice its 533 cooling total, while the typical coldest-to-warmest-month gap reaches 55.8°F. The annual mean therefore compresses two materially different seasons.
Rochester's frost-free season lasts about 159 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
-
1. Rochester coldest normal
January
Averaging 15°F (-10°C), this month sits below freezing for the month as a whole, not merely overnight.
-
2. Rochester typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Rochester snow peak
December
Rochester averages 53.1 inches of snow a year, with December the snowiest month on the normals.
Questions about Rochester's climate
How much snow does Rochester get? ▼
How cold does Rochester get in winter? ▼
How much energy does heating and cooling require in Rochester? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Rochester's primary station: ROCHESTER INTL AP (USW00014925). 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 2754880). Match rule for Rochester: 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 Rochester 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.