Ruby, AK Climate: Temperature by Month
Annual temperature and rainfall from NOAA NCEI's 1991–2020 normals →; comfort score computed by PlainClimate
30-year climate normals (1991-2020) from Ruby's primary NOAA station, RUBY 44 ESE.
The climate verdict for Ruby
Winter sets the terms in Ruby, Alaska. A pronounced 71.3°F seasonal swing and heating demand above twice the cooling total frame an annual average of 26°F. July is the warmest month at 60°F and January the coldest at -11°F.
- 26°F
- annual average temperature (NOAA normal)
- 104 days
- frost-free growing season
Ruby: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USW00096406 · Ruby, AK 26°F mean
TEMP-COLD · RANK-COOL · PHOTO-FINISH · PRCP-UNK · SWING-WIDE · COMF-UNK · LOAD-HEAT · STN-1 · BOOK-PART
- TEMP-COLD 26°F
- RANK-COOL #1
- PHOTO-FINISH ≈ Nabesna
- PRCP-UNK Rain n/a
- SWING-WIDE 71°F
- COMF-UNK Comfort n/a
- LOAD-HEAT 14,088 HDD
- STN-1 USW00096406
- BOOK-PART 4/6 fields
Nearest mean-temperature peer: Nabesna, AK (+ 0.4 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every AK station list.
- Hot Gennallen Kcam, AK 27°F
- Near Nabesna, AK 27°F
- Near Ester, AK 27°F
- Near Eielson Fld, AK 27°F
- Ruby (this station) 26°F
Ruby sits in Alaska, the #1 coldest U.S. state at 33.5°F statewide annual average - see all 50 coldest states ranked by NOAA normals
Climate Living Index · Ruby
Ruby: 0/100 · grade F
Ruby publishes 3 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 3 missing weights rescale to 100.
PlainClimate-derived for Ruby, not an official NOAA rating. Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Annual temperature balance | 26.3°F · 41.2° from 67.5°F | 0/100 · F |
| Frost-free season | 104 days/year | 0/100 · F |
| Normal heat + freeze calendar | 239 calendar days | 0/100 · F |
Ruby · 2026-08-04 · NOAA NCEI Climate Normals · method .
National standing · heating-led station
Where Ruby sits across the climate record
Available NOAA 1991–2020 fields for Ruby are ranked only against stations that publish the same field, missing metrics stay blank rather than estimated.
- Annual temperature
- Cooler than 100%
- Among 6,861 stations, Ruby sits in the cooler third of annual means.
- Seasonal temperature swing
- Wider than 99%
- Warmest-to-coldest month gap for Ruby is large versus 6,861 complete station-years.
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | -1°F (-19°C) | -21°F (-29°C) | -11°F (-24°C) | N/A | 31.0 | 0.0 |
| February | 12°F (-11°C) | -8°F (-22°C) | 2°F (-17°C) | N/A | 28.0 | 0.0 |
| March | 24°F (-4°C) | -4°F (-20°C) | 10°F (-12°C) | N/A | 30.8 | 0.0 |
| April | 43°F (6°C) | 18°F (-8°C) | 31°F (-1°C) | N/A | 27.9 | 0.0 |
| May | 59°F (15°C) | 33°F (1°C) | 46°F (8°C) | N/A | 12.0 | 0.0 |
| June | 70°F (21°C) | 46°F (8°C) | 58°F (14°C) | N/A | 0.7 | 0.0 |
| July | 71°F (22°C) | 49°F (10°C) | 60°F (16°C) | N/A | 0.0 | 0.3 |
| August | 64°F (18°C) | 43°F (6°C) | 54°F (12°C) | N/A | 2.1 | 0.0 |
| September | 53°F (11°C) | 33°F (0°C) | 43°F (6°C) | N/A | 14.2 | 0.0 |
| October | 34°F (1°C) | 17°F (-8°C) | 26°F (-4°C) | N/A | 26.3 | 0.0 |
| November | 12°F (-11°C) | -6°F (-21°C) | 3°F (-16°C) | N/A | 30.0 | 0.0 |
| December | 4°F (-16°C) | -13°F (-25°C) | -4°F (-20°C) | N/A | 31.0 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 72°F around June 28, short of 90°F on every date, while 239 dates carry a normal low at or below freezing, the coldest -23°F near January 11.
The freezing stretch
The normal low stays at or below 32°F into May 13, then returns to freezing around September 18, covering 239 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
The widest day
March 22 carries the biggest normal gap between afternoon and dawn, 29°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Ruby.
Where Ruby Stands Nationally
Winters bite deep and often: the normal nightly low dips to freezing or below on around 239 nights a year, placing this among the most frost-prone tenth of ranked stations.
Ruby earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall
Frost Dates & Growing Season
First Fall Freeze
September 3
50% probability date
Last Spring Freeze
May 22
50% probability date
Growing Season
104 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
14,088
Higher = more heating needed
Cooling Degree Days
17
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside AK closest to Ruby on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (26°F here).
- Cooke City, MT 34°F · 7.9°F off
- Crested Butte, CO 34°F · 7.9°F off
- Silver Gate, MT 34°F · 8.0°F off
- Stanley, ID 34°F · 8.1°F off
Data-derived climate profile
How Ruby's climate pattern fits together
heating led · high swing
Winter and seasonal range jointly define this record. Ruby logs 14,088 heating degree days, more than twice its 17 cooling total, while the typical coldest-to-warmest-month gap reaches 71.3°F. The annual mean therefore compresses two materially different seasons.
Only about 104 days are frost-free in a normal year. That short interval is consistent with the cold-season signal, but the measure does not predict the exact first or last freeze in any one year.
Ruby's calendar has a pronounced split: July and January mark the typical warm and cold ends of the calendar, with 71.3°F between them. The annual average is 26°F. That average is context, while the monthly highs, lows, and precipitation totals describe the lived parts of the year.
A moisture-range label is withheld because Ruby's annual precipitation total is unavailable. Monthly source values remain visible where NOAA provides them, and no annual amount is reconstructed from incomplete data.
These labels group NOAA 1991-2020 normals from Ruby's primary station, so the winter figures are a thirty-year average and not a floor: a single hard season can run well below them. Treat each band as a descriptive range for Ruby, not an official NOAA class or a year-ahead forecast.
Questions about Ruby's climate
How cold does Ruby get in winter? ▼
How much energy does heating and cooling require in Ruby? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Ruby's primary station: RUBY 44 ESE (USW00096406). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as an incorporated place (GEOID 0265590). Match rule for Ruby: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Ruby comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.