Adrian, Michigan climate: Normal weather by month, frost dates and records
Adrian's normal year runs from 17°F January nights to 84°F July afternoons, with 29.9 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 9.6°C, January lows of −8°C, July highs of 29°C, 761 mm of precipitation a year.
- NOAA stationAdrian Lenawee County Airport
- Station IDUSW00004847
- Location41.87°N 84.08°W
- Elevation796 ft (243 m)
- From the center3 miles
- Population20,259
On October 23, the normal high in Adrian is 59°F and the normal low 39°F, and the chance of measurable rain or snow is 34%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Adrian.
- Jan 32° 17°
- Feb 35° 19°
- Mar 45° 27°
- Apr 59° 37°
- May 70° 48°
- Jun 80° 58°
- Jul 84° 62°
- Aug 81° 60°
- Sep 75° 52°
- Oct 62° 42°
- Nov 48° 32°
- Dec 36° 24°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Adrian each month?
July is the warmest month, with normal highs of 84°F; January the coldest, with normal lows of 17°F. The most precipitation falls in June (3.36 in), the least in February (1.49 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 32°F | 17°F | 24.4°F | 1.64 | 9 | <1 | 28 | 9 h 30 min |
| February | 35°F | 19°F | 26.8°F | 1.49 | 9 | <1 | 26 | 10 h 30 min |
| March | 45°F | 27°F | 36.3°F | 1.97 | 9 | <1 | 23 | 11 h 50 min |
| April | 59°F | 37°F | 48.0°F | 3.04 | 12 | <1 | 8 | 13 h 20 min |
| May | 70°F | 48°F | 59.3°F | 3.12 | 13 | 1 | 1 | 14 h 30 min |
| June | 80°F | 58°F | 69.0°F | 3.36 | 11 | 3 | <1 | 15 h 10 min |
| July | 84°F | 62°F | 72.6°F | 3.12 | 9 | 6 | <1 | 15 h |
| August | 81°F | 60°F | 70.6°F | 2.83 | 11 | 2 | <1 | 14 h |
| September | 75°F | 52°F | 63.3°F | 2.63 | 12 | 2 | <1 | 12 h 30 min |
| October | 62°F | 42°F | 51.7°F | 2.56 | 11 | <1 | 4 | 11 h 10 min |
| November | 48°F | 32°F | 39.7°F | 2.32 | 10 | <1 | 17 | 9 h 50 min |
| December | 36°F | 24°F | 29.9°F | 1.87 | 11 | <1 | 26 | 9 h 10 min |
| Year (annual) | 59°F | 40°F | 49.3°F | 29.95 | 126 | 12 | 132 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 0°C | −8°C | −4.2°C | 42 mm |
| February | 1°C | −7°C | −2.9°C | 38 mm |
| March | 7°C | −3°C | 2.4°C | 50 mm |
| April | 15°C | 3°C | 8.9°C | 77 mm |
| May | 21°C | 9°C | 15.2°C | 79 mm |
| June | 27°C | 15°C | 20.6°C | 85 mm |
| July | 29°C | 16°C | 22.6°C | 79 mm |
| August | 27°C | 16°C | 21.4°C | 72 mm |
| September | 24°C | 11°C | 17.4°C | 67 mm |
| October | 17°C | 5°C | 10.9°C | 65 mm |
| November | 9°C | 0°C | 4.3°C | 59 mm |
| December | 2°C | −5°C | −1.2°C | 47 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. Adrian's own co-op station Adrian (2 mi NNE) does: 26 inches of snow in a normal year (see the other stations below).
Source: NOAA NCEI 1991-2020 monthly normals, station USW00004847; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Adrian?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, July has the fewest days with rain (9).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00004847.
When is the last frost in Adrian?
In Adrian, the last spring frost (32°F) comes after April 27 in half of years and after May 14 in one year in ten; the first autumn frost comes before October 20 in half of years and before October 4 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- April 271 year in 10 after May 14; 9 in 10 after April 13
- First autumn frost, half of years before
- October 201 year in 10 before October 4; 9 in 10 before November 1
NOAA puts the median frost-free season at 173 days, and the season without a hard freeze (28°F) at 196 days.
A hard freeze (28°F) comes after April 16 in half of springs and before October 31 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Adrian in zone 6a in ZIP code 49221, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Adrian's NOAA station is in zone 6a: the coldest night of a typical year reaches −7°F (20 complete years).
Frost dates for every NOAA station in Michigan · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00004847; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Adrian?
In a normal year in Adrian, 12 days a year reach 90°F, 132 nights fall to 32°F or colder and 126 days bring measurable precipitation.
- Days at 90°F or more
- 12a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 132a normal year
- Days that stay below freezing
- 46high of 32°F or less
- Days with 0.01 inch of precipitation
- 126a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USW00004847.
How sunny is Adrian?
Over a year 72% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Adrian, 3.9 kWh per square metre a day. July is the sunniest month (81%) and December the cloudiest (56%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 58% | 1.6 |
| February | 63% | 2.5 |
| March | 65% | 3.5 |
| April | 69% | 4.7 |
| May | 71% | 5.5 |
| June | 77% | 6.2 |
| July | 81% | 6.2 |
| August | 80% | 5.4 |
| September | 78% | 4.4 |
| October | 69% | 2.9 |
| November | 65% | 1.9 |
| December | 56% | 1.4 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Adrian need?
A normal year in Adrian brings 6,383 heating degree days, 19% more than the median U.S. place (5,373), and 694 cooling degree days, 23% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,868 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,257 | 0 |
| February | 1,070 | 0 |
| March | 892 | 1 |
| April | 514 | 3 |
| May | 217 | 39 |
| June | 35 | 155 |
| July | 5 | 239 |
| August | 12 | 186 |
| September | 118 | 65 |
| October | 419 | 8 |
| November | 759 | 0 |
| December | 1,087 | 0 |
| Year (annual) | 6,383 | 694 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00004847. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Adrian been warmer than normal lately?
2025 averaged 50.6°F, 1.3°F above the 1991-2020 normal of 49.3°F. 3 of the 3 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 51.1°F | +1.8°F | 37.63 |
| 2022 | 49.4°F | +0.1°F | 26.79 |
| 2025 | 50.6°F | +1.3°F | – |
Source: observed years: ACIS, station USW00004847. A year counts only with all twelve months complete.
How does Adrian's climate compare?
Adrian is warmer than 124 of the other 139 places with their own NOAA record in Michigan, and wetter than 10. Across the 7,247 U.S. stations with normals, its annual mean of 49.3°F is warmer than 37%.
In the Köppen classification computed from these normals, Adrian is Dfa: continental, no dry season, hot summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Adrian share this climate record?
2 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Jasper, MI358 people · 6 mi S
- Clayton, MI319 people · 8 mi W
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
What do Adrian's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Adrian. This page uses Adrian Lenawee County Airport; the other differs by site and elevation:
| Station | From the center | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Adrian (2 mi NNE) USC00200032 | 2 mi NE | 760 ft | 49.4°F | 17°F | 85°F | 36.7 | 26 | May 1 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Adrian's climate
What is the coldest month in Adrian?
January, with a normal high of 32°F and a normal low of 17°F. The warmest is July (84°F by day, 62°F at night).
Does it snow in Adrian?
Yes. NOAA publishes no 1991-2020 snowfall normal for Adrian's NOAA station; Adrian's own co-op station Adrian (2 mi NNE) records 26 inches of snow in a normal year.
What is the rainiest month in Adrian?
June, with 3.36 in of precipitation in a normal year; the driest is February with 1.49 in.
What plant hardiness zone is Adrian in?
The USDA's 2023 map puts Adrian in zone 6a in ZIP code 49221, the nearest ZIP area. By the same method at Adrian's NOAA station, the coldest night of a typical year reaches −7°F (20 years, 1991-2020): zone 6a.
How late can frost come in Adrian?
In half of years the last 32°F night comes after April 27; in one year in ten it comes after May 14. Waiting until May 14 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Adrian in OctoberThis month day by day, its records and recent years
- Michigan climateThe statewide normals and every place in the state
- Tipton (2 mi WNW), MI11 miles from this station, 47.5°F a year
- Blissfield, MI11 miles from this station, 48.6°F a year
- Tecumseh, MI12 miles from this station, 48.6°F a year
- Morenci, MI12 miles from this station, 48.4°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made