Two Rivers, Alaska climate: Normal weather by month, frost dates and records
Two Rivers's normal year runs from −13°F January nights to 75°F July afternoons, with 15.8 inches of precipitation and 61 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of −1.2°C, January lows of −25°C, July highs of 24°C, 402 mm of precipitation a year.
- NOAA stationTwo Rivers
- Station IDUSC00509489
- Location64.87°N 146.95°W
- Elevation605 ft (184 m)
- Population (census place)571
On October 23, the normal high in Two Rivers is 30°F and the normal low 13°F, and the chance of measurable rain or snow is 31%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Two Rivers.
- Jan 6° -13°
- Feb 18° -4°
- Mar 29° 1°
- Apr 49° 22°
- May 65° 34°
- Jun 74° 45°
- Jul 75° 49°
- Aug 68° 44°
- Sep 56° 34°
- Oct 36° 18°
- Nov 16° -2°
- Dec 9° -10°
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 Two Rivers each month?
July is the warmest month, with normal highs of 75°F; January the coldest, with normal lows of −13°F. The most precipitation falls in July (3.19 in), the least in March (0.39 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 6°F | −13°F | -3.4°F | 0.55 | 10.5 | 7 | <1 | 31 | 5 h |
| February | 18°F | −4°F | 6.5°F | 0.57 | 6.9 | 5 | <1 | 28 | 8 h 20 min |
| March | 29°F | 1°F | 14.9°F | 0.39 | 6.0 | 4 | <1 | 31 | 11 h 30 min |
| April | 49°F | 22°F | 35.3°F | 0.40 | 2.1 | 3 | <1 | 27 | 15 h |
| May | 65°F | 34°F | 49.4°F | 1.02 | 0.7 | 8 | <1 | 14 | 18 h 30 min |
| June | 74°F | 45°F | 59.6°F | 2.41 | 0.0 | 12 | <1 | 1 | 21 h 40 min |
| July | 75°F | 49°F | 62.0°F | 3.19 | 0.0 | 15 | <1 | <1 | 20 h 20 min |
| August | 68°F | 44°F | 55.9°F | 3.13 | 0.0 | 17 | <1 | 2 | 16 h 40 min |
| September | 56°F | 34°F | 45.3°F | 1.95 | 1.4 | 13 | <1 | 12 | 13 h 10 min |
| October | 36°F | 18°F | 27.0°F | 0.88 | 12.1 | 10 | <1 | 29 | 9 h 50 min |
| November | 16°F | −2°F | 6.8°F | 0.73 | 12.7 | 8 | <1 | 30 | 6 h 20 min |
| December | 9°F | −10°F | -0.5°F | 0.59 | 9.0 | 7 | <1 | 31 | 3 h 50 min |
| Year (annual) | 42°F | 18°F | 29.9°F | 15.81 | 61.4 | 109 | <1 | 236 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −14°C | −25°C | −19.7°C | 14 mm | 27 cm |
| February | −8°C | −20°C | −14.2°C | 14 mm | 18 cm |
| March | −2°C | −17°C | −9.5°C | 10 mm | 15 cm |
| April | 9°C | −5°C | 1.8°C | 10 mm | 5 cm |
| May | 18°C | 1°C | 9.7°C | 26 mm | 2 cm |
| June | 23°C | 7°C | 15.3°C | 61 mm | 0 cm |
| July | 24°C | 10°C | 16.7°C | 81 mm | 0 cm |
| August | 20°C | 7°C | 13.3°C | 80 mm | 0 cm |
| September | 13°C | 1°C | 7.4°C | 50 mm | 4 cm |
| October | 2°C | −8°C | −2.8°C | 22 mm | 31 cm |
| November | −9°C | −19°C | −14.0°C | 19 mm | 32 cm |
| December | −13°C | −23°C | −18.1°C | 15 mm | 23 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00509489; 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 Two Rivers?
Normal highs sit between 65°F and 85°F in June, July and August. Of those, June has the fewest days with rain (12).
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 USC00509489.
When is the last frost in Two Rivers?
In Two Rivers, the last spring frost (32°F) comes after May 30 in half of years and after June 13 in one year in ten; the first autumn frost comes before September 2 in half of years and before August 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 301 year in 10 after June 13; 9 in 10 after May 12
- First autumn frost, half of years before
- September 21 year in 10 before August 13; 9 in 10 before September 17
NOAA puts the median frost-free season at 95 days, and the season without a hard freeze (28°F) at 123 days.
A hard freeze (28°F) comes after May 16 in half of springs and before September 16 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Two Rivers in zone 2a in ZIP code 99705, the nearest ZIP area.
Frost dates for every NOAA station in Alaska · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00509489; 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 Two Rivers?
In a normal year in Two Rivers, a 90°F day is rare, 236 nights fall to 32°F or colder and 109 days bring measurable precipitation.
- 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
- 236a normal year
- Days that stay below freezing
- 153high of 32°F or less
- Days with 0.01 inch of precipitation
- 109a normal year
- Days with 1 inch of snow or more
- 22a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00509489.
How sunny is Two Rivers?
Over a year 71% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Two Rivers, 2.6 kWh per square metre a day. March is the sunniest month (84%) and October the cloudiest (62%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 75% | 0.2 |
| February | 75% | 0.8 |
| March | 84% | 2.6 |
| April | 83% | 4.4 |
| May | 73% | 5.2 |
| June | 69% | 5.4 |
| July | 66% | 4.8 |
| August | 67% | 3.7 |
| September | 67% | 2.3 |
| October | 62% | 1.0 |
| November | 63% | 0.3 |
| December | 79% | 0.1 |
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 Two Rivers need?
A normal year in Two Rivers brings 12,819 heating degree days, 2.4 times the median U.S. place (5,373), and 54 cooling degree days, 94% 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 982 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 2,119 | 0 |
| February | 1,637 | 0 |
| March | 1,551 | 0 |
| April | 891 | 0 |
| May | 484 | 1 |
| June | 178 | 17 |
| July | 122 | 28 |
| August | 290 | 8 |
| September | 593 | 0 |
| October | 1,180 | 0 |
| November | 1,744 | 0 |
| December | 2,031 | 0 |
| Year (annual) | 12,819 | 54 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00509489. 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 Two Rivers's climate compare?
Two Rivers is warmer than 33 of the other 84 places with their own NOAA record in Alaska, and wetter than 25. Across the 7,247 U.S. stations with normals, its annual mean of 29.9°F is warmer than 1%.
In the Köppen classification computed from these normals, Two Rivers is Dfc: continental, no dry season, cool 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 Two Rivers share this climate record?
Pleasant Valley has no NOAA station with 1991-2020 normals of its 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.
- Pleasant Valley, AK507 people · 2 mi NE
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Two Rivers's climate
What is the coldest month in Two Rivers?
January, with a normal high of 6°F and a normal low of −13°F. The warmest is July (75°F by day, 49°F at night).
Does it snow in Two Rivers?
Yes: 61 inches in a normal year, falling on 52 days with 0.1 inch or more, the most in November (12.7 inches).
What is the rainiest month in Two Rivers?
July, with 3.19 in of precipitation in a normal year; the driest is March with 0.39 in.
What plant hardiness zone is Two Rivers in?
The USDA's 2023 map puts Two Rivers in zone 2a in ZIP code 99705, the nearest ZIP area.
How late can frost come in Two Rivers?
In half of years the last 32°F night comes after May 30; in one year in ten it comes after June 13. Waiting until June 13 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Alaska climateThe statewide normals and every place in the state
- Badger, AK13 miles from this station, 28.1°F a year
- North Pole, AK14 miles from this station, 26.5°F a year
- Eielson Field, AK14 miles from this station, 26.9°F a year
- Fort Knox Mine, AK15 miles from this station, 30.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made