St Peter, MN 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 St Peter's primary NOAA station, ST PETER.
The climate verdict for St Peter
Winter sets the terms in St Peter, Minnesota. A pronounced 59°F seasonal swing and heating demand above twice the cooling total frame an annual average of 44°F. At 49/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 18% of scores.
- 44°F
- average temperature, NOAA 1991-2020 normal
- 49/100
- comfort score, above 18% of station-mapped location scores
- 32.4"
- annual precipitation · 38" snow
- 155 days
- growing season, frost-free days
St Peter: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00217405 · St Peter, MN 44°F mean · 32.4" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-MID · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 44°F
- RANK-COOL #1,029
- PHOTO-FINISH ≈ Glasgow
- PRCP-MID 32.4"
- SWING-WIDE 59°F
- COMF-LOW 49/100
- LOAD-HEAT 8,214 HDD
- STN-1 USC00217405
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Glasgow, MT (+ 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.
- St Peter (this station) 44°F
- Hot Dassel, MN 44°F
- Near Glasgow, MT 44°F
- Near Faulkton, SD 44°F
- Near Sisseton, SD 44°F
St Peter 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 · St Peter
St Peter: 36/100 · grade F
St Peter publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for St Peter, not an official NOAA rating. Rankings still use Comfort Score 49/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 32.4 in · 2.6 from 35 in | 90/100 · A |
| Normal heat + freeze calendar | 173 calendar days | 30/100 · F |
| Snowfall burden | 37.9 inches/year | 30/100 · F |
| Frost-free season | 155 days/year | 29/100 · F |
| Annual temperature balance | 43.9°F · 23.6° from 67.5°F | 16/100 · F |
St Peter · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
St Peter is a continental Köppen climate: Dfb
Coldest-month mean 12.5°F and warmest-month mean 71.5°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
- 71.5°F
- Coldest month
- 12.5°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 St Peter sits across the climate record
Three NOAA fields for St Peter's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 85%
- Among 6,861 stations, St Peter sits in the cooler third of annual means.
- Annual precipitation
- 43rd percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Wider than 97%
- Warmest-to-coldest month gap for St Peter is large versus 6,861 complete station-years.
How St Peter compares across U.S. station-mapped locations
St Peter's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
49 18th percentile score exceeds 18% 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
St Peter's measured station temperature trend
MethodologyAcross 75 complete annual observations from 1894 to 2024, ST PETER 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.
- St Peter 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 | 22°F (-6°C) | 3°F (-16°C) | 13°F (-11°C) | 1.0" | 8.8" | 30.8 | 0.0 |
| February | 27°F (-3°C) | 7°F (-14°C) | 17°F (-8°C) | 1.0" | 8.2" | 27.3 | 0.0 |
| March | 40°F (4°C) | 21°F (-6°C) | 30°F (-1°C) | 1.8" | 4.2" | 26.0 | 0.0 |
| April | 55°F (13°C) | 33°F (0°C) | 44°F (7°C) | 3.1" | 2.7" | 12.3 | 0.1 |
| May | 68°F (20°C) | 46°F (8°C) | 57°F (14°C) | 4.0" | 0.0" | 1.3 | 0.9 |
| June | 78°F (25°C) | 57°F (14°C) | 67°F (20°C) | 5.1" | 0.0" | 0.0 | 2.6 |
| July | 82°F (28°C) | 61°F (16°C) | 72°F (22°C) | 4.4" | 0.0" | 0.0 | 4.1 |
| August | 79°F (26°C) | 59°F (15°C) | 69°F (21°C) | 3.6" | 0.0" | 0.0 | 1.9 |
| September | 72°F (22°C) | 49°F (9°C) | 60°F (16°C) | 3.2" | 0.0" | 0.9 | 0.8 |
| October | 58°F (15°C) | 35°F (2°C) | 47°F (8°C) | 2.5" | 0.2" | 10.3 | 0.0 |
| November | 42°F (5°C) | 23°F (-5°C) | 32°F (0°C) | 1.7" | 3.2" | 23.5 | 0.0 |
| December | 28°F (-2°C) | 11°F (-12°C) | 19°F (-7°C) | 1.2" | 10.6" | 30.2 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 82°F around July 12, short of 90°F on every date, while 173 dates carry a normal low at or below freezing, the coldest 2°F near January 22.
The freezing stretch
The normal low stays at or below 32°F into April 13, then returns to freezing around October 24, covering 173 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 June 5, when 36% of years recorded at least a hundredth of an inch. The driest is February 12 at 15%. Summed across the calendar, that is about 85 wet dates a year.
The widest day
September 24 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 St Peter.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 8.8"
5.0 days with precipitation
Snow: 8.2"
4.3 days with precipitation
Snow: 4.2"
5.9 days with precipitation
Snow: 2.7"
8.2 days with precipitation
10.2 days with precipitation
10.6 days with precipitation
8.9 days with precipitation
8.0 days with precipitation
7.0 days with precipitation
Snow: 0.2"
6.8 days with precipitation
Snow: 3.2"
4.7 days with precipitation
Snow: 10.6"
5.3 days with precipitation
St Peter runs a summer-peaked wet season
40% of St Peter'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 5.1", on a wide 59°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, July, May, taking 42% of the annual total between them.
- Driest month: February at 1.0".
- Winter share: 10% 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.
When it rains in St Peter, it arrives in quantity
32.4" of precipitation falls across only about 85 wet days here, averaging 0.38 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 85 a year, 23% of all days
- Average depth per wet day
- 0.38 inches
- Most wet days
- June, about 11
- Fewest wet days
- February, about 4
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.
Winter brings real snow to St Peter
St Peter averages 37.9 inches of snowfall a year, with December the snowiest month on the normals, spread across roughly 15 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: 37.9 inches of depth.
- Days recording measurable snow: about 15 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 12% 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 4
50% probability date
Last Spring Freeze
May 2
50% probability date
Growing Season
155 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
8,214
Higher = more heating needed
Cooling Degree Days
577
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside MN closest to St Peter 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 (44°F here).
- Bethel, ME 44°F · 0.0°F off
- Carter, MT 44°F · 0.0°F off
- Colton, NY 44°F · 0.0°F off
- Dayton, WY 44°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (32.4" here), excluding temperature-peer places.
- Washington, KS 32.4" · 0.0" off
- Houghton Lake, MI 32.4" · 0.0" off
- Fairbury, NE 32.4" · 0.0" off
- Archer City, TX 32.5" · 0.0" off
Snow and freeze rhythm
When cold and snow define St Peter
heating led · moderate · high swing
Winter and seasonal range jointly define this record. St Peter logs 8,214 heating degree days, more than twice its 577 cooling total, while the typical coldest-to-warmest-month gap reaches 59.0°F. The annual mean therefore compresses two materially different seasons.
St Peter's frost-free season lasts about 155 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
-
1. St Peter coldest normal
January
Averaging 13°F (-11°C), this month sits below freezing for the month as a whole, not merely overnight.
-
2. St Peter typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. St Peter snow peak
December
St Peter averages 37.9 inches of snow a year, with December the snowiest month on the normals.
Questions about St Peter's climate
How much snow does St Peter get? ▼
How cold does St Peter get in winter? ▼
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Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from St Peter's primary station: ST PETER (USC00217405). 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 2758036). Match rule for St Peter: 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 St Peter 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.