Island Lake (4 mi E), Minnesota climate: Climate normals at a NOAA weather station
Island Lake (4 mi E)'s normal year runs from −2°F January nights to 77°F July afternoons, with 30.7 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 3.8°C, January lows of −19°C, July highs of 25°C, 779 mm of precipitation a year.
- NOAA stationIsland Lake (4 mi E)
- Station IDUSC00214093
- Location47.02°N 92.07°W
- Elevation1,410 ft (430 m)
On October 22, the normal high in Island Lake (4 mi E) is 48°F and the normal low 32°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Island Lake (4 mi E).
- Jan 17° -2°
- Feb 23° 1°
- Mar 36° 15°
- Apr 48° 28°
- May 63° 40°
- Jun 72° 50°
- Jul 77° 55°
- Aug 75° 54°
- Sep 66° 46°
- Oct 51° 34°
- Nov 35° 21°
- Dec 23° 7°
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 Island Lake (4 mi E) each month?
July is the warmest month, with normal highs of 77°F; January the coldest, with normal lows of −2°F. The most precipitation falls in June (4.40 in), the least in February (0.98 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 17°F | −2°F | 7.3°F | 1.00 | – | <1 | 31 | 8 h 50 min |
| February | 23°F | 1°F | 12.0°F | 0.98 | – | <1 | 28 | 10 h 20 min |
| March | 36°F | 15°F | 25.3°F | 1.41 | – | <1 | 29 | 11 h 50 min |
| April | 48°F | 28°F | 38.2°F | 2.36 | – | <1 | 24 | 13 h 30 min |
| May | 63°F | 40°F | 51.2°F | 3.40 | – | <1 | 7 | 15 h |
| June | 72°F | 50°F | 60.9°F | 4.40 | – | <1 | <1 | 15 h 50 min |
| July | 77°F | 55°F | 65.9°F | 4.08 | – | <1 | <1 | 15 h 30 min |
| August | 75°F | 54°F | 64.5°F | 3.46 | – | <1 | <1 | 14 h 20 min |
| September | 66°F | 46°F | 56.2°F | 3.49 | – | <1 | 2 | 12 h 40 min |
| October | 51°F | 34°F | 42.7°F | 2.91 | – | <1 | 13 | 11 h |
| November | 35°F | 21°F | 28.1°F | 1.76 | – | <1 | 26 | 9 h 20 min |
| December | 23°F | 7°F | 14.8°F | 1.42 | – | <1 | 31 | 8 h 30 min |
| Year (annual) | 49°F | 29°F | 38.9°F | 30.67 | – | 1 | 190 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | −8°C | −19°C | −13.7°C | 25 mm |
| February | −5°C | −17°C | −11.1°C | 25 mm |
| March | 2°C | −10°C | −3.7°C | 36 mm |
| April | 9°C | −2°C | 3.4°C | 60 mm |
| May | 17°C | 4°C | 10.7°C | 86 mm |
| June | 22°C | 10°C | 16.1°C | 112 mm |
| July | 25°C | 13°C | 18.8°C | 104 mm |
| August | 24°C | 12°C | 18.1°C | 88 mm |
| September | 19°C | 8°C | 13.4°C | 89 mm |
| October | 11°C | 1°C | 5.9°C | 74 mm |
| November | 2°C | −6°C | −2.2°C | 45 mm |
| December | −5°C | −14°C | −9.6°C | 36 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Duluth (15 miles away), gets 90 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00214093; 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 Island Lake (4 mi E)?
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 USC00214093.
When is the last frost at Island Lake (4 mi E)?
In Island Lake (4 mi E), the last spring frost (32°F) comes after May 21 in half of years and after June 3 in one year in ten; the first autumn frost comes before September 27 in half of years and before September 13 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 211 year in 10 after June 3; 9 in 10 after May 6
- First autumn frost, half of years before
- September 271 year in 10 before September 13; 9 in 10 before October 10
NOAA puts the median frost-free season at 129 days, and the season without a hard freeze (28°F) at 152 days.
A hard freeze (28°F) comes after May 7 in half of springs and before October 7 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Island Lake (4 mi E) in zone 4a in ZIP code 55803, 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 USC00214093; 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 Island Lake (4 mi E)?
In a normal year in Island Lake (4 mi E), 1 day a year reaches 90°F and 190 nights fall to 32°F or colder.
- Days at 90°F or more
- 1a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 190a normal year
- Days that stay below freezing
- 107high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00214093.
How sunny is it at Island Lake (4 mi E)?
Over a year 71% of the sunlight that would reach the ground under clear skies gets through the clouds at Island Lake (4 mi E), 3.6 kWh per square metre a day. July is the sunniest month (78%) and December the cloudiest (57%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 66% | 1.4 |
| February | 74% | 2.5 |
| March | 73% | 3.7 |
| April | 69% | 4.7 |
| May | 67% | 5.3 |
| June | 70% | 5.8 |
| July | 78% | 6.1 |
| August | 76% | 5.1 |
| September | 71% | 3.7 |
| October | 63% | 2.3 |
| November | 59% | 1.4 |
| December | 57% | 1.0 |
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 Island Lake (4 mi E) record?
A normal year at Island Lake (4 mi E) brings 9,661 heating degree days, 80% more than the median U.S. place (5,373), and 188 cooling degree days, 79% fewer than the median (908). Eight months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 1,659 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,788 | 0 |
| February | 1,484 | 0 |
| March | 1,231 | 0 |
| April | 806 | 0 |
| May | 432 | 5 |
| June | 149 | 24 |
| July | 55 | 81 |
| August | 80 | 63 |
| September | 281 | 15 |
| October | 692 | 0 |
| November | 1,109 | 0 |
| December | 1,556 | 0 |
| Year (annual) | 9,661 | 188 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00214093. 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 Island Lake (4 mi E)'s climate compare?
Island Lake (4 mi E) is warmer than 16 of the 129 places with their own NOAA record in Minnesota, and wetter than 67. Across the 7,247 U.S. stations with normals, its annual mean of 38.9°F is warmer than 4%.
In the Köppen classification computed from these normals, Island Lake (4 mi E) 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 Island Lake (4 mi E)'s climate
What is the coldest month at Island Lake (4 mi E)?
January, with a normal high of 17°F and a normal low of −2°F. The warmest is July (77°F by day, 55°F at night).
Does it snow at Island Lake (4 mi E)?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Duluth (15 miles away), records 90 inches of snow in a normal year.
What is the rainiest month at Island Lake (4 mi E)?
June, with 4.40 in of precipitation in a normal year; the driest is February with 0.98 in.
What plant hardiness zone is Island Lake (4 mi E) in?
The USDA's 2023 map puts Island Lake (4 mi E) in zone 4a in ZIP code 55803, the nearest ZIP area.
How late can frost come at Island Lake (4 mi E)?
In half of years the last 32°F night comes after May 21; in one year in ten it comes after June 3. Waiting until June 3 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Minnesota climateThe statewide normals and every place in the state
- Duluth, MN14 miles from this station, 40.6°F a year
- Hermantown, MN14 miles from this station, 39.7°F a year
- Brimson (2 mi S), MN18 miles from this station, 36.9°F a year
- Two Harbors, MN19 miles from this station, 41.3°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made