Astoria, SD Climate: Temperature by Month
Temperature and precipitation from NOAA NCEI 1991–2020 normals →, plus PlainClimate's derived comfort score
30-year climate normals (1991-2020) from Astoria's primary NOAA station, ASTORIA 4S.
The climate verdict for Astoria
Winter sets the terms in Astoria, South Dakota. A pronounced 58.1°F seasonal swing and heating demand above twice the cooling total frame an annual average of 42°F. July is the warmest month at 70°F and January the coldest at 12°F.
- 42°F
- yearly average temperature, NOAA normal
- 150 days
- frost-free days per growing season
Astoria: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00390422 · Astoria, SD 42°F mean
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-UNK · SWING-WIDE · COMF-UNK · LOAD-HEAT · STN-1 · BOOK-PART
- TEMP-COOL 42°F
- RANK-COOL #686
- PHOTO-FINISH ≈ Wild Rvr State…
- PRCP-UNK Rain n/a
- SWING-WIDE 58°F
- COMF-UNK Comfort n/a
- LOAD-HEAT 8,617 HDD
- STN-1 USC00390422
- BOOK-PART 4/6 fields
Nearest mean-temperature peer: Wild Rvr State Park, MN (+ 0.1 °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 SD station list.
- Hot Center, ND 43°F
- Near Wild Rvr State…, MN 43°F
- Near Fairfield, ND 43°F
- Near Solon Springs, WI 43°F
- Astoria (this station) 42°F
Climate Living Index · Astoria
Astoria: 20/100 · grade F
Astoria publishes 3 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 3 missing weights rescale to 100.
PlainClimate-derived for Astoria, not an official NOAA rating. Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 176 calendar days | 28/100 · F |
| Frost-free season | 150 days/year | 25/100 · F |
| Annual temperature balance | 42.4°F · 25.1° from 67.5°F | 10/100 · F |
Astoria · 2026-08-04 · NOAA NCEI Climate Normals · method .
National standing · heating-led station
Where Astoria sits across the climate record
Available NOAA 1991–2020 fields for Astoria are ranked only against stations that publish the same field, missing metrics stay blank rather than estimated.
- Annual temperature
- Cooler than 90%
- Among 6,861 stations, Astoria sits in the cooler third of annual means.
- Seasonal temperature swing
- Wider than 96%
- Warmest-to-coldest month gap for Astoria 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 | 20°F (-6°C) | 3°F (-16°C) | 12°F (-11°C) | N/A | 30.9 | 0.0 |
| February | 25°F (-4°C) | 7°F (-14°C) | 16°F (-9°C) | N/A | 27.6 | 0.0 |
| March | 37°F (3°C) | 19°F (-7°C) | 28°F (-2°C) | N/A | 26.6 | 0.0 |
| April | 52°F (11°C) | 32°F (0°C) | 42°F (5°C) | N/A | 15.1 | 0.0 |
| May | 65°F (19°C) | 44°F (7°C) | 55°F (13°C) | N/A | 2.5 | 0.3 |
| June | 75°F (24°C) | 55°F (13°C) | 65°F (18°C) | N/A | 0.0 | 0.7 |
| July | 80°F (27°C) | 60°F (15°C) | 70°F (21°C) | N/A | 0.0 | 3.3 |
| August | 78°F (25°C) | 58°F (14°C) | 68°F (20°C) | N/A | 0.0 | 1.6 |
| September | 70°F (21°C) | 49°F (9°C) | 60°F (15°C) | N/A | 0.5 | 0.5 |
| October | 56°F (13°C) | 36°F (2°C) | 46°F (8°C) | N/A | 11.0 | 0.0 |
| November | 40°F (4°C) | 22°F (-6°C) | 31°F (-1°C) | N/A | 24.7 | 0.0 |
| December | 26°F (-4°C) | 10°F (-12°C) | 18°F (-8°C) | N/A | 30.7 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 81°F around July 13, short of 90°F on every date, while 176 dates carry a normal low at or below freezing, the coldest 2°F near January 21.
The freezing stretch
The normal low stays at or below 32°F into April 16, then returns to freezing around October 24, covering 176 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
September 18 carries the biggest normal gap between afternoon and dawn, 22°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Astoria.
Where Astoria Stands Nationally
Days and nights track unusually close together; the widest normal swing, about 22°F, is narrower than most stations record.
Astoria 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
October 3
50% probability date
Last Spring Freeze
May 6
50% probability date
Growing Season
150 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
8,617
Higher = more heating needed
Cooling Degree Days
441
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside SD closest to Astoria 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 (42°F here).
- Chinook, MT 42°F · 0.0°F off
- Ridgeland, WI 42°F · 0.0°F off
- Ruth, NV 42°F · 0.0°F off
- Soda Springs, ID 42°F · 0.0°F off
Data-derived climate profile
How Astoria's climate pattern fits together
heating led · high swing
Winter and seasonal range jointly define this record. Astoria logs 8,617 heating degree days, more than twice its 441 cooling total, while the typical coldest-to-warmest-month gap reaches 58.1°F. The annual mean therefore compresses two materially different seasons.
Astoria's frost-free season lasts about 150 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
Astoria's calendar has a pronounced split: July and January mark the typical warm and cold ends of the calendar, with 58.1°F between them. The annual average is 42°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 Astoria'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 Astoria'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 Astoria, not an official NOAA class or a year-ahead forecast.
Questions about Astoria's climate
How cold does Astoria get in winter? ▼
How much energy does heating and cooling require in Astoria? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Astoria's primary station: ASTORIA 4S (USC00390422). 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 4602580). Match rule for Astoria: 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 Astoria 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.