Isabella (14 mi W), Minnesota climate: Climate normals at a NOAA weather station
Isabella (14 mi W)'s normal year runs from −5°F January nights to 76°F July afternoons, with 29.9 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 2.9°C, January lows of −21°C, July highs of 25°C, 761 mm of precipitation a year.
- NOAA stationIsabella (14 mi W)
- Station IDUSC00214077
- Location47.59°N 91.65°W
- Elevation1,740 ft (530 m)
On October 22, the normal high in Isabella (14 mi W) is 47°F and the normal low 29°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Isabella (14 mi W).
- Jan 16° -5°
- Feb 22° -3°
- Mar 34° 11°
- Apr 48° 25°
- May 63° 39°
- Jun 71° 48°
- Jul 76° 53°
- Aug 75° 51°
- Sep 65° 43°
- Oct 50° 32°
- Nov 34° 19°
- Dec 22° 4°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Isabella (14 mi W) each month?
July is the warmest month, with normal highs of 76°F; January the coldest, with normal lows of −5°F. The most precipitation falls in June (4.26 in), the least in February (0.87 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 16°F | −5°F | 5.5°F | 0.94 | – | <1 | 31 | 8 h 50 min |
| February | 22°F | −3°F | 9.2°F | 0.87 | – | <1 | 28 | 10 h 10 min |
| March | 34°F | 11°F | 22.7°F | 1.54 | – | <1 | 29 | 11 h 50 min |
| April | 48°F | 25°F | 36.5°F | 2.08 | – | <1 | 25 | 13 h 30 min |
| May | 63°F | 39°F | 50.6°F | 3.17 | – | <1 | 11 | 15 h 10 min |
| June | 71°F | 48°F | 59.9°F | 4.26 | – | <1 | 1 | 16 h |
| July | 76°F | 53°F | 64.5°F | 4.06 | – | <1 | <1 | 15 h 40 min |
| August | 75°F | 51°F | 62.8°F | 3.27 | – | <1 | 1 | 14 h 20 min |
| September | 65°F | 43°F | 54.2°F | 3.54 | – | <1 | 4 | 12 h 40 min |
| October | 50°F | 32°F | 41.0°F | 3.10 | – | <1 | 18 | 11 h |
| November | 34°F | 19°F | 26.4°F | 1.91 | – | <1 | 27 | 9 h 20 min |
| December | 22°F | 4°F | 13.0°F | 1.21 | – | <1 | 31 | 8 h 30 min |
| Year (annual) | 48°F | 26°F | 37.2°F | 29.95 | – | <1 | 206 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | −9°C | −21°C | −14.7°C | 24 mm |
| February | −6°C | −20°C | −12.7°C | 22 mm |
| March | 1°C | −12°C | −5.2°C | 39 mm |
| April | 9°C | −4°C | 2.5°C | 53 mm |
| May | 17°C | 4°C | 10.3°C | 81 mm |
| June | 22°C | 9°C | 15.5°C | 108 mm |
| July | 25°C | 12°C | 18.1°C | 103 mm |
| August | 24°C | 10°C | 17.1°C | 83 mm |
| September | 18°C | 6°C | 12.3°C | 90 mm |
| October | 10°C | 0°C | 5.0°C | 79 mm |
| November | 1°C | −7°C | −3.1°C | 49 mm |
| December | −6°C | −15°C | −10.6°C | 31 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Babbitt (16 miles away), gets 84 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00214077; 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.
Which months are mildest at Isabella (14 mi W)?
Normal highs sit between 65°F and 85°F in June, July, August and September.
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 USC00214077.
When is the last frost at Isabella (14 mi W)?
In Isabella (14 mi W), the last spring frost (32°F) comes after May 31 in half of years and after June 21 in one year in ten; the first autumn frost comes before September 15 in half of years and before August 30 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
- May 311 year in 10 after June 21; 9 in 10 after May 16
- First autumn frost, half of years before
- September 151 year in 10 before August 30; 9 in 10 before September 29
NOAA puts the median frost-free season at 104 days, and the season without a hard freeze (28°F) at 129 days.
A hard freeze (28°F) comes after May 16 in half of springs and before September 25 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Isabella (14 mi W) in zone 3b in ZIP code 55607, the nearest ZIP area.
Frost dates for every NOAA station in Minnesota · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00214077; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. 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 at Isabella (14 mi W)?
In a normal year in Isabella (14 mi W), a 90°F day is rare and 206 nights fall to 32°F or colder.
- Days at 90°F or more
- fewer than 1a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 206a normal year
- Days that stay below freezing
- 114high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00214077.
How sunny is it at Isabella (14 mi W)?
Over a year 69% of the sunlight that would reach the ground under clear skies gets through the clouds at Isabella (14 mi W), 3.5 kWh per square metre a day. July is the sunniest month (78%) and December the cloudiest (55%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 58% | 1.2 |
| February | 63% | 2.1 |
| March | 66% | 3.3 |
| April | 69% | 4.6 |
| May | 69% | 5.4 |
| June | 71% | 5.9 |
| July | 78% | 6.1 |
| August | 77% | 5.1 |
| September | 72% | 3.7 |
| October | 63% | 2.3 |
| November | 57% | 1.3 |
| December | 55% | 0.9 |
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 many heating and cooling degree days does Isabella (14 mi W) record?
A normal year at Isabella (14 mi W) brings 10,249 heating degree days, 91% more than the median U.S. place (5,373), and 147 cooling degree days, 84% fewer than the median (908). Nine months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 1,487 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,846 | 0 |
| February | 1,562 | 0 |
| March | 1,313 | 0 |
| April | 856 | 0 |
| May | 452 | 5 |
| June | 174 | 21 |
| July | 78 | 63 |
| August | 118 | 48 |
| September | 335 | 11 |
| October | 744 | 0 |
| November | 1,160 | 0 |
| December | 1,612 | 0 |
| Year (annual) | 10,249 | 147 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00214077. 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.
How does Isabella (14 mi W)'s climate compare?
Isabella (14 mi W) is warmer than 6 of the 129 places with their own NOAA record in Minnesota, and wetter than 62. Across the 7,247 U.S. stations with normals, its annual mean of 37.2°F is warmer than 3%.
In the Köppen classification computed from these normals, Isabella (14 mi W) is Dfb: continental, no dry season, warm 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.
Questions about Isabella (14 mi W)'s climate
What is the coldest month at Isabella (14 mi W)?
January, with a normal high of 16°F and a normal low of −5°F. The warmest is July (76°F by day, 53°F at night).
Does it snow at Isabella (14 mi W)?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Babbitt (16 miles away), records 84 inches of snow in a normal year.
What is the rainiest month at Isabella (14 mi W)?
June, with 4.26 in of precipitation in a normal year; the driest is February with 0.87 in.
What plant hardiness zone is Isabella (14 mi W) in?
The USDA's 2023 map puts Isabella (14 mi W) in zone 3b in ZIP code 55607, the nearest ZIP area.
How late can frost come at Isabella (14 mi W)?
In half of years the last 32°F night comes after May 31; in one year in ten it comes after June 21. Waiting until June 21 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Minnesota climateThe statewide normals and every place in the state
- Babbitt, MN16 miles from this station, 36.7°F a year
- Wolf Ridge Environmental Learning Center, MN22 miles from this station, 38.9°F a year
- Ely, MN23 miles from this station, 38.6°F a year
- Brimson (2 mi S), MN26 miles from this station, 36.9°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made