Ruby (44 mi ESE), Alaska climate: Climate normals at a NOAA weather station
Ruby (44 mi ESE)'s normal year runs from −21°F January nights to 71°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of −3.2°C, January lows of −29°C, July highs of 22°C.
- NOAA stationRuby (44 mi ESE)
- Station IDUSW00096406
- Location64.50°N 154.13°W
- Elevation259 ft (79 m)
On October 23, the normal high in Ruby (44 mi ESE) is 28°F and the normal low 11°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Ruby (44 mi ESE).
- Jan -1° -21°
- Feb 12° -8°
- Mar 24° -4°
- Apr 43° 18°
- May 59° 33°
- Jun 70° 46°
- Jul 71° 49°
- Aug 64° 43°
- Sep 53° 33°
- Oct 34° 17°
- Nov 12° -6°
- Dec 4° -13°
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 Ruby (44 mi ESE) each month?
July is the warmest month, with normal highs of 71°F; January the coldest, with normal lows of −21°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | −1°F | −21°F | -11.1°F | – | <1 | 31 | 5 h 10 min |
| February | 12°F | −8°F | 1.7°F | – | <1 | 28 | 8 h 30 min |
| March | 24°F | −4°F | 10.3°F | – | <1 | 31 | 11 h 30 min |
| April | 43°F | 18°F | 30.7°F | – | <1 | 28 | 15 h |
| May | 59°F | 33°F | 46.4°F | – | <1 | 12 | 18 h 20 min |
| June | 70°F | 46°F | 57.9°F | – | <1 | 1 | 21 h 20 min |
| July | 71°F | 49°F | 60.2°F | – | <1 | <1 | 20 h |
| August | 64°F | 43°F | 53.5°F | – | <1 | 2 | 16 h 40 min |
| September | 53°F | 33°F | 42.6°F | – | <1 | 14 | 13 h 10 min |
| October | 34°F | 17°F | 25.6°F | – | <1 | 26 | 10 h |
| November | 12°F | −6°F | 2.9°F | – | <1 | 30 | 6 h 30 min |
| December | 4°F | −13°F | -4.5°F | – | <1 | 31 | 4 h |
| Year (annual) | 37°F | 16°F | 26.3°F | – | <1 | 234 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | −19°C | −29°C | −23.9°C |
| February | −11°C | −22°C | −16.8°C |
| March | −4°C | −20°C | −12.1°C |
| April | 6°C | −8°C | −0.7°C |
| May | 15°C | 1°C | 8.0°C |
| June | 21°C | 8°C | 14.4°C |
| July | 22°C | 10°C | 15.7°C |
| August | 18°C | 6°C | 11.9°C |
| September | 11°C | 0°C | 5.9°C |
| October | 1°C | −8°C | −3.6°C |
| November | −11°C | −21°C | −16.2°C |
| December | −16°C | −25°C | −20.3°C |
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 USW00096406; 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 Ruby (44 mi ESE)?
Normal highs sit between 65°F and 85°F in June and July.
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 USW00096406.
When is the last frost at Ruby (44 mi ESE)?
In Ruby (44 mi ESE), the last spring frost (32°F) comes after May 22 in half of years and after June 3 in one year in ten; the first autumn frost comes before September 3 in half of years and before August 21 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 221 year in 10 after June 3; 9 in 10 after May 12
- First autumn frost, half of years before
- September 31 year in 10 before August 21; 9 in 10 before September 17
NOAA puts the median frost-free season at 101 days, and the season without a hard freeze (28°F) at 123 days.
A hard freeze (28°F) comes after May 12 in half of springs and before September 13 in half of autumns.
Frost dates for every NOAA station in Alaska · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00096406. 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 Ruby (44 mi ESE)?
In a normal year in Ruby (44 mi ESE), a 90°F day is rare and 234 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
- 234a normal year
- Days that stay below freezing
- 141high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USW00096406.
How sunny is it at Ruby (44 mi ESE)?
Over a year 71% of the sunlight that would reach the ground under clear skies gets through the clouds at Ruby (44 mi ESE), 2.5 kWh per square metre a day. March is the sunniest month (85%) and October the cloudiest (60%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 78% | 0.2 |
| February | 74% | 0.8 |
| March | 85% | 2.6 |
| April | 82% | 4.4 |
| May | 74% | 5.2 |
| June | 69% | 5.4 |
| July | 65% | 4.7 |
| August | 65% | 3.6 |
| September | 65% | 2.3 |
| October | 60% | 0.9 |
| November | 67% | 0.3 |
| December | 78% | 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 many heating and cooling degree days does Ruby (44 mi ESE) record?
A normal year at Ruby (44 mi ESE) brings 14,088 heating degree days, 2.6 times the median U.S. place (5,373), and 17 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 728 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 2,345 | 0 |
| February | 1,780 | 0 |
| March | 1,688 | 0 |
| April | 1,035 | 0 |
| May | 578 | 0 |
| June | 224 | 6 |
| July | 164 | 11 |
| August | 359 | 0 |
| September | 673 | 0 |
| October | 1,228 | 0 |
| November | 1,854 | 0 |
| December | 2,160 | 0 |
| Year (annual) | 14,088 | 17 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00096406. 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 Ruby (44 mi ESE) been warmer than normal?
2023 averaged 25.1°F, 1.2°F below the 1991-2020 normal of 26.3°F. 1 of the 3 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal |
|---|---|---|
| 2021 | 23.8°F | −2.5°F |
| 2022 | 26.4°F | +0.1°F |
| 2023 | 25.1°F | −1.2°F |
Source: observed years: ACIS, station USW00096406. A year counts only with all twelve months complete.
How does Ruby (44 mi ESE)'s climate compare?
Ruby (44 mi ESE) is warmer than 16 of the 85 places with their own NOAA record in Alaska. Across the 7,247 U.S. stations with normals, its annual mean of 26.3°F is warmer than 1%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Questions about Ruby (44 mi ESE)'s climate
What is the coldest month at Ruby (44 mi ESE)?
January, with a normal high of −1°F and a normal low of −21°F. The warmest is July (71°F by day, 49°F at night).
How late can frost come at Ruby (44 mi ESE)?
In half of years the last 32°F night comes after May 22; 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
- Alaska climateThe statewide normals and every place in the state
- Minchumina, AK69 miles from this station, 28.0°F a year
- Tanana, AK75 miles from this station, 25.5°F a year
- Galena, AK83 miles from this station, 26.0°F a year
- McGrath, AK116 miles from this station, 28.9°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made