Cooper Landing, Alaska climate: Normal weather by month, frost dates and records
Cooper Landing's normal year runs from 9°F January nights to 69°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 2.6°C, January lows of −13°C, July highs of 21°C.
- NOAA stationCooper Landing (5 mi W)
- Station IDUSC00502149
- Location60.49°N 149.97°W
- Elevation375 ft (114 m)
- Population (census place)231
On October 23, the normal high in Cooper Landing is 40°F and the normal low 24°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Cooper Landing.
- Jan 24° 9°
- Feb 31° 14°
- Mar 37° 14°
- Apr 48° 26°
- May 59° 33°
- Jun 67° 41°
- Jul 69° 47°
- Aug 67° 44°
- Sep 57° 37°
- Oct 44° 27°
- Nov 31° 17°
- Dec 27° 12°
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 Cooper Landing each month?
July is the warmest month, with normal highs of 69°F; January the coldest, with normal lows of 9°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 24°F | 9°F | 16.5°F | – | <1 | 29 | 6 h 30 min |
| February | 31°F | 14°F | 22.5°F | – | <1 | 25 | 9 h |
| March | 37°F | 14°F | 25.6°F | – | <1 | 29 | 11 h 40 min |
| April | 48°F | 26°F | 37.1°F | – | <1 | 24 | 14 h 30 min |
| May | 59°F | 33°F | 46.1°F | – | <1 | 18 | 17 h 10 min |
| June | 67°F | 41°F | 53.7°F | – | <1 | 4 | 19 h |
| July | 69°F | 47°F | 57.9°F | – | <1 | <1 | 18 h 20 min |
| August | 67°F | 44°F | 55.5°F | – | <1 | 2 | 15 h 50 min |
| September | 57°F | 37°F | 46.9°F | – | <1 | 10 | 13 h |
| October | 44°F | 27°F | 35.3°F | – | <1 | 22 | 10 h 20 min |
| November | 31°F | 17°F | 23.9°F | – | <1 | 27 | 7 h 30 min |
| December | 27°F | 12°F | 19.7°F | – | <1 | 29 | 5 h 50 min |
| Year (annual) | 47°F | 27°F | 36.7°F | – | <1 | 219 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | −4°C | −13°C | −8.6°C |
| February | 0°C | −10°C | −5.3°C |
| March | 3°C | −10°C | −3.6°C |
| April | 9°C | −3°C | 2.8°C |
| May | 15°C | 1°C | 7.8°C |
| June | 19°C | 5°C | 12.1°C |
| July | 21°C | 8°C | 14.4°C |
| August | 19°C | 7°C | 13.1°C |
| September | 14°C | 3°C | 8.3°C |
| October | 7°C | −3°C | 1.8°C |
| November | 0°C | −9°C | −4.5°C |
| December | −3°C | −11°C | −6.8°C |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Seward (19 mi N) (23 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 USC00502149; 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 Cooper Landing?
Normal highs sit between 65°F and 85°F in June, July and August.
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 USC00502149.
When is the last frost in Cooper Landing?
In Cooper Landing, the last spring frost (32°F) comes after June 12 in half of years and after July 2 in one year in ten; the first autumn frost comes before September 1 in half of years and before August 14 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
- June 121 year in 10 after July 2; 9 in 10 after May 29
- First autumn frost, half of years before
- September 11 year in 10 before August 14; 9 in 10 before September 17
NOAA puts the median frost-free season at 78 days, and the season without a hard freeze (28°F) at 114 days.
A hard freeze (28°F) comes after May 26 in half of springs and before September 15 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Cooper Landing in zone 5a in ZIP code 99572.
Frost dates for every NOAA station in Alaska · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00502149; 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 in Cooper Landing?
In a normal year in Cooper Landing, a 90°F day is rare and 219 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
- 219a normal year
- Days that stay below freezing
- 79high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00502149.
How sunny is Cooper Landing?
Over a year 59% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Cooper Landing, 2.4 kWh per square metre a day. March is the sunniest month (64%) and November the cloudiest (52%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 53% | 0.3 |
| February | 55% | 0.9 |
| March | 64% | 2.3 |
| April | 61% | 3.6 |
| May | 61% | 4.6 |
| June | 59% | 4.9 |
| July | 60% | 4.6 |
| August | 58% | 3.5 |
| September | 57% | 2.3 |
| October | 53% | 1.1 |
| November | 52% | 0.4 |
| December | 53% | 0.2 |
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 Cooper Landing need?
A normal year in Cooper Landing brings 10,295 heating degree days, 92% more than the median U.S. place (5,373), and 6 cooling degree days, 99% fewer than the median (908). Ten months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 613 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,503 | 0 |
| February | 1,192 | 0 |
| March | 1,221 | 0 |
| April | 837 | 0 |
| May | 584 | 0 |
| June | 340 | 1 |
| July | 222 | 4 |
| August | 296 | 1 |
| September | 543 | 0 |
| October | 919 | 0 |
| November | 1,231 | 0 |
| December | 1,406 | 0 |
| Year (annual) | 10,295 | 6 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00502149. 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 Cooper Landing's climate compare?
Cooper Landing is warmer than 50 of the other 84 places with their own NOAA record in Alaska. Across the 7,247 U.S. stations with normals, its annual mean of 36.7°F is warmer than 2%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Questions about Cooper Landing's climate
What is the coldest month in Cooper Landing?
January, with a normal high of 24°F and a normal low of 9°F. The warmest is July (69°F by day, 47°F at night).
Does it snow in Cooper Landing?
Yes. NOAA publishes no 1991-2020 snowfall normal for Cooper Landing's NOAA station; the nearest record that keeps one, Seward (19 mi N) (23 miles away), records 90 inches of snow in a normal year.
What plant hardiness zone is Cooper Landing in?
The USDA's 2023 map puts Cooper Landing in zone 5a in ZIP code 99572.
How late can frost come in Cooper Landing?
In half of years the last 32°F night comes after June 12; in one year in ten it comes after July 2. Waiting until July 2 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Alaska climateThe statewide normals and every place in the state
- Cooper Lake Project, AK12 miles from this station, 38.4°F a year
- Moose Pass, AK19 miles from this station, 35.7°F a year
- Kenai (29 mi ENE), AK23 miles from this station, 34.2°F a year
- Hope, AK30 miles from this station, 36.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made