Saint Johns, 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 Saint Johns's primary NOAA station, SAINT JOHNS.
The climate verdict for Saint Johns
Saint Johns, 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 64/100 (good) lands mid-pack nationally, exceeding 49% of station-mapped location scores.
- 49°F
- average temperature, NOAA 1991-2020 normal
- 64/100
- comfort score, above 49% of station-mapped location scores
- 34.0"
- annual precipitation
- 179 days
- growing season, frost-free days
Saint Johns: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00207280 · Saint Johns, MI 49°F mean · 34.0" 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 #2,470
- PHOTO-FINISH ≈ Scottsbluff
- PRCP-MID 34.0"
- SWING-WIDE 49°F
- COMF-MID 64/100
- LOAD-HEAT 6,508 HDD
- STN-1 USC00207280
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Scottsbluff, NE (+ 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.
- Saint Johns (this station) 49°F
- Cold Altona, IL 49°F
- Hot Lisle-morton Ar…, IL 49°F
- Near Scottsbluff, NE 49°F
- Near Minatare Dam, NE 49°F
Climate Living Index · Saint Johns
Saint Johns: 55/100 · grade C
Saint Johns publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Saint Johns, not an official NOAA rating. Rankings still use Comfort Score 64/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 34.0 in · 1.0 from 35 in | 94/100 · A |
| Normal heat + freeze calendar | 139 calendar days | 53/100 · D |
| Frost-free season | 179 days/year | 49/100 · D |
| Annual temperature balance | 49.1°F · 18.4° from 67.5°F | 36/100 · F |
Saint Johns · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Saint Johns is a continental Köppen climate: Dfa
Coldest-month mean 24.2°F and warmest-month mean 72.8°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
- 72.8°F
- Coldest month
- 24.2°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 Saint Johns sits across the climate record
Three NOAA fields for Saint Johns's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 36th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- 46th percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Wider than 76%
- Warmest-to-coldest month gap for Saint Johns is large versus 6,861 complete station-years.
How Saint Johns compares across U.S. station-mapped locations
Saint Johns'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 | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 31°F (-1°C) | 18°F (-8°C) | 24°F (-4°C) | 2.1" | 29.1 | 0.0 |
| February | 33°F (1°C) | 19°F (-7°C) | 26°F (-3°C) | 1.8" | 26.7 | 0.0 |
| March | 44°F (7°C) | 26°F (-3°C) | 35°F (2°C) | 1.9" | 25.2 | 0.0 |
| April | 57°F (14°C) | 36°F (2°C) | 47°F (8°C) | 3.6" | 12.9 | 0.0 |
| May | 69°F (21°C) | 48°F (9°C) | 59°F (15°C) | 3.8" | 0.9 | 0.5 |
| June | 79°F (26°C) | 59°F (15°C) | 69°F (20°C) | 3.4" | 0.0 | 2.7 |
| July | 83°F (28°C) | 62°F (17°C) | 73°F (23°C) | 3.2" | 0.0 | 4.2 |
| August | 81°F (27°C) | 61°F (16°C) | 71°F (22°C) | 3.5" | 0.0 | 2.5 |
| September | 75°F (24°C) | 53°F (12°C) | 64°F (18°C) | 2.9" | 0.2 | 0.8 |
| October | 62°F (17°C) | 43°F (6°C) | 52°F (11°C) | 3.3" | 5.0 | 0.0 |
| November | 47°F (8°C) | 33°F (0°C) | 40°F (4°C) | 2.8" | 17.3 | 0.0 |
| December | 36°F (2°C) | 24°F (-4°C) | 30°F (-1°C) | 1.8" | 27.0 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 84°F around July 11, short of 90°F on every date, while 139 dates carry a normal low at or below freezing, the coldest 16°F near January 26.
The freezing stretch
The normal low stays at or below 32°F into April 4, then returns to freezing around November 18, covering 139 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 April 22, when 40% of years recorded at least a hundredth of an inch. The driest is July 4 at 30%. Summed across the calendar, that is about 130 wet dates a year.
The widest day
September 16 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 Saint Johns.
Where Saint Johns Stands Nationally
Days and nights track unusually close together; the widest normal swing, about 22°F, is narrower than most stations record.
Saint Johns 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
12.5 days with precipitation
9.8 days with precipitation
10.3 days with precipitation
11.9 days with precipitation
12.1 days with precipitation
10.1 days with precipitation
9.4 days with precipitation
10.2 days with precipitation
9.6 days with precipitation
11.3 days with precipitation
11.0 days with precipitation
10.8 days with precipitation
Saint Johns 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 17%, with neither reaching the 35% that would mark a distinct wet season. Saint Johns has no dry season to plan around, though it does carry a wide 48.6°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: May averages 3.8" and February 1.8". The three wettest months together take 32% 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 Saint Johns's precipitation splits across the calendar
About 129 days a year record measurable precipitation here, carrying 34.0" between them, or roughly 0.26 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.
Frost Dates & Growing Season
First Fall Freeze
October 24
50% probability date
Last Spring Freeze
April 28
50% probability date
Growing Season
179 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,508
Higher = more heating needed
Cooling Degree Days
745
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside MI closest to Saint Johns 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).
- Arlington, WA 49°F · 0.0°F off
- Byers, CO 49°F · 0.0°F off
- Crystal Lake, IL 49°F · 0.0°F off
- Greenfield, IA 49°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (34.0" here), excluding temperature-peer places.
- Winnebago, MN 34.0" · 0.0" off
- Lindsay, OK 34.0" · 0.0" off
- Sandusky, OH 34.0" · 0.0" off
- Stevens Point, WI 34.0" · 0.0" off
Data-derived climate profile
How Saint Johns's climate pattern fits together
heating led · moderate · mid swing
Saint Johns's energy balance leans toward cold weather: 6,508 annual heating degree days against 745 for cooling. Its 48.6°F seasonal range still makes the monthly rows more useful than the annual average alone.
Saint Johns's frost-free season lasts about 179 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 Saint Johns's middle-range seasonal profile. The measured spread is 48.6°F. The annual average is 49°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Saint Johns's 34.0 inches of annual precipitation falls in PlainClimate's middle band, so “wet” or “dry” is not the leading description. Snowfall is not added to the interpretation because its annual value is missing. Temperature balance and the calendar distribution carry more information than the annual moisture label alone.
These labels group NOAA 1991-2020 normals from Saint Johns'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 Saint Johns, not an official NOAA class or a year-ahead forecast.
Questions about Saint Johns's climate
How much rain does Saint Johns get? ▼
How cold does Saint Johns get in winter? ▼
How much energy does heating and cooling require in Saint Johns? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Saint Johns's primary station: SAINT JOHNS (USC00207280). 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 Saint Johns; 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 Saint Johns 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.