Circle Hot Springs, Alaska climate: Climate normals at a NOAA weather station
Circle Hot Springs's normal year runs from −23°F January nights to 72°F July afternoons, with 12.1 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of −5.9°C, January lows of −30°C, July highs of 22°C, 306 mm of precipitation a year.
- NOAA stationCircle Hot Springs
- Station IDUSC00501987
- Location65.49°N 144.64°W
- Elevation860 ft (262 m)
On October 23, the normal high in Circle Hot Springs is 21°F and the normal low 5°F, and the chance of measurable rain or snow is 26%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Circle Hot Springs.
- Jan -9° -23°
- Feb 1° -19°
- Mar 15° -13°
- Apr 40° 11°
- May 59° 31°
- Jun 71° 42°
- Jul 72° 45°
- Aug 65° 39°
- Sep 52° 28°
- Oct 27° 10°
- Nov 4° -12°
- Dec -4° -20°
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 Circle Hot Springs each month?
July is the warmest month, with normal highs of 72°F; January the coldest, with normal lows of −23°F. The most precipitation falls in June (2.64 in), the least in March (0.17 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | −9°F | −23°F | -15.6°F | 0.44 | 7 | <1 | 31 | 4 h 40 min |
| February | 1°F | −19°F | -9.2°F | 0.32 | 4 | <1 | 28 | 8 h 20 min |
| March | 15°F | −13°F | 0.9°F | 0.17 | 4 | <1 | 31 | 11 h 30 min |
| April | 40°F | 11°F | 25.3°F | 0.25 | 3 | <1 | 29 | 15 h 10 min |
| May | 59°F | 31°F | 44.9°F | 0.71 | 6 | <1 | 19 | 18 h 50 min |
| June | 71°F | 42°F | 56.4°F | 2.64 | 9 | <1 | 3 | 22 h 30 min |
| July | 72°F | 45°F | 58.9°F | 2.61 | 13 | <1 | 1 | 20 h 40 min |
| August | 65°F | 39°F | 51.8°F | 1.80 | 12 | <1 | 8 | 16 h 50 min |
| September | 52°F | 28°F | 40.0°F | 1.35 | 10 | <1 | 22 | 13 h 20 min |
| October | 27°F | 10°F | 18.8°F | 0.84 | 8 | <1 | 30 | 9 h 50 min |
| November | 4°F | −12°F | -4.1°F | 0.44 | 6 | <1 | 30 | 6 h 10 min |
| December | −4°F | −20°F | -12.1°F | 0.48 | 7 | <1 | 31 | 3 h 20 min |
| Year (annual) | 33°F | 10°F | 21.3°F | 12.05 | 89 | <1 | 263 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | −23°C | −30°C | −26.4°C | 11 mm |
| February | −17°C | −28°C | −22.9°C | 8 mm |
| March | −10°C | −25°C | −17.3°C | 4 mm |
| April | 4°C | −12°C | −3.7°C | 6 mm |
| May | 15°C | −1°C | 7.2°C | 18 mm |
| June | 22°C | 5°C | 13.6°C | 67 mm |
| July | 22°C | 7°C | 14.9°C | 66 mm |
| August | 18°C | 4°C | 11.0°C | 46 mm |
| September | 11°C | −2°C | 4.4°C | 34 mm |
| October | −3°C | −12°C | −7.3°C | 21 mm |
| November | −16°C | −25°C | −20.1°C | 11 mm |
| December | −20°C | −29°C | −24.5°C | 12 mm |
NOAA publishes no 1991-2020 snowfall normal for this station, and no record within 25 miles keeps one, so snow is left out here rather than estimated.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00501987; 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 Circle Hot Springs?
Normal highs sit between 65°F and 85°F in June and July. Of those, June 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 USC00501987.
How hot and how cold does it get at Circle Hot Springs?
In a normal year in Circle Hot Springs, a 90°F day is rare, 263 nights fall to 32°F or colder and 89 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
- 263a normal year
- Days that stay below freezing
- 175high of 32°F or less
- Days with 0.01 inch of precipitation
- 89a normal year
The highest temperature in this station's record (since 1935) is 94°F, on June 26, 2000; the lowest is −60°F, on January 23, 1951.
The wettest calendar year on that record is 1970, with 16.54 in; the snowiest season is 2021–22, with 93.8 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00501987; records: ACIS (NOAA Regional Climate Centers), station USC00501987. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Circle Hot Springs?
Over a year 71% of the sunlight that would reach the ground under clear skies gets through the clouds at Circle Hot Springs, 2.5 kWh per square metre a day. March is the sunniest month (86%) and October the cloudiest (59%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 72% | 0.1 |
| February | 77% | 0.8 |
| March | 86% | 2.6 |
| April | 86% | 4.6 |
| May | 73% | 5.2 |
| June | 70% | 5.6 |
| July | 65% | 4.7 |
| August | 65% | 3.6 |
| September | 65% | 2.2 |
| October | 59% | 0.9 |
| November | 64% | 0.2 |
| December | 77% | 0.0 |
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 Circle Hot Springs record?
A normal year at Circle Hot Springs brings 15,902 heating degree days, 3.0 times the median U.S. place (5,373), and 19 cooling degree days, 98% 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 638 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 2,498 | 0 |
| February | 2,078 | 0 |
| March | 1,989 | 0 |
| April | 1,193 | 0 |
| May | 623 | 0 |
| June | 266 | 7 |
| July | 200 | 11 |
| August | 409 | 1 |
| September | 749 | 0 |
| October | 1,432 | 0 |
| November | 2,074 | 0 |
| December | 2,392 | 0 |
| Year (annual) | 15,902 | 19 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00501987. 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.
Have recent years at Circle Hot Springs been warmer than normal?
2025 averaged 24.0°F, 2.7°F above the 1991-2020 normal of 21.3°F. 3 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 20.1°F | −1.2°F | 13.88 |
| 2022 | 21.2°F | −0.1°F | 10.35 |
| 2023 | 24.1°F | +2.8°F | 12.84 |
| 2024 | 22.6°F | +1.3°F | 9.93 |
| 2025 | 24.0°F | +2.7°F | 12.71 |
Over 35 complete years from 1944 to 2025, the station's annual mean temperature rose at a fitted 5.6°F per century (+0.31°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00501987; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Circle Hot Springs's climate compare?
Circle Hot Springs is warmer than 4 of the 85 places with their own NOAA record in Alaska, and wetter than 11. Across the 7,247 U.S. stations with normals, its annual mean of 21.3°F is warmer than 0%.
In the Köppen classification computed from these normals, Circle Hot Springs is Dsc: continental, dry-summer, 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.
Questions about Circle Hot Springs's climate
What is the coldest month at Circle Hot Springs?
January, with a normal high of −9°F and a normal low of −23°F. The warmest is July (72°F by day, 45°F at night).
What is the rainiest month at Circle Hot Springs?
June, with 2.64 in of precipitation in a normal year; the driest is March with 0.17 in.
Nearby and next
- Alaska climateThe statewide normals and every place in the state
- Central, AK6 miles from this station, 23.0°F a year
- Mile 42 Steese, AK75 miles from this station, 27.6°F a year
- Two Rivers, AK80 miles from this station, 29.9°F a year
- Fort Knox Mine, AK85 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