Illahe, OR 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 Illahe's primary NOAA station, ILLAHE.
The climate verdict for Illahe
A compact 28.4°F seasonal swing gives Illahe, Oregon a steadier-than-extreme annual shape. NOAA reports an annual average of 56°F. August is the warmest month at 72°F and December the coldest at 43°F.
- 56°F
- yearly average temperature, NOAA normal
- 232 days
- frost-free growing season
Illahe: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00354133 · Illahe, OR 56°F mean
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-UNK · SWING-NARROW · COMF-UNK · LOAD-HEAT · STN-1 · BOOK-PART
- TEMP-MILD 56°F
- RANK-UPPER #4,322
- PHOTO-FINISH ≈ Roseburg Rgnl
- PRCP-UNK Rain n/a
- SWING-NARROW 28°F
- COMF-UNK Comfort n/a
- LOAD-HEAT 3,883 HDD
- STN-1 USC00354133
- BOOK-PART 4/6 fields
Nearest mean-temperature peer: Roseburg Rgnl, OR (+ 0 °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 OR station list.
- Illahe (this station) 56°F
- Cold Kitt Peak, AZ 56°F
- Hot Roseburg Kqen, OR 56°F
- Near Roseburg Rgnl, OR 56°F
- Near Covelo, CA 56°F
Climate Living Index · Illahe
Illahe: 78/100 · grade B
Illahe publishes 3 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 3 missing weights rescale to 100.
PlainClimate-derived for Illahe, not an official NOAA rating. Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 42 calendar days | 93/100 · A |
| Frost-free season | 232 days/year | 82/100 · B |
| Annual temperature balance | 55.9°F · 11.6° from 67.5°F | 62/100 · C |
Illahe · 2026-08-04 · NOAA NCEI Climate Normals · method .
National standing · heating-led station
Where Illahe sits across the climate record
Available NOAA 1991–2020 fields for Illahe are ranked only against stations that publish the same field, missing metrics stay blank rather than estimated.
- Annual temperature
- 63rd percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Seasonal temperature swing
- Narrower than 92%
- Warmest-to-coldest month gap for Illahe is compact 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 | 51°F (11°C) | 37°F (3°C) | 44°F (7°C) | N/A | 4.9 | 0.0 |
| February | 54°F (12°C) | 38°F (3°C) | 46°F (8°C) | N/A | 4.2 | 0.0 |
| March | 59°F (15°C) | 39°F (4°C) | 49°F (9°C) | N/A | 1.8 | 0.0 |
| April | 65°F (18°C) | 40°F (4°C) | 52°F (11°C) | N/A | 0.4 | 0.1 |
| May | 75°F (24°C) | 43°F (6°C) | 59°F (15°C) | N/A | 0.1 | 1.8 |
| June | 81°F (27°C) | 49°F (9°C) | 65°F (18°C) | N/A | 0.0 | 4.2 |
| July | 90°F (32°C) | 52°F (11°C) | 71°F (22°C) | N/A | 0.0 | 15.2 |
| August | 91°F (33°C) | 52°F (11°C) | 72°F (22°C) | N/A | 0.0 | 16.8 |
| September | 86°F (30°C) | 48°F (9°C) | 67°F (19°C) | N/A | 0.0 | 11.0 |
| October | 69°F (21°C) | 44°F (6°C) | 56°F (13°C) | N/A | 0.5 | 0.1 |
| November | 55°F (13°C) | 40°F (4°C) | 47°F (9°C) | N/A | 2.5 | 0.0 |
| December | 51°F (10°C) | 36°F (2°C) | 43°F (6°C) | N/A | 4.7 | 0.0 |
The year, day by day
The year in Illahe runs from a mild 35°F around December 17 to 93°F at the peak near July 28, and the normal low never reaches freezing on any date in the record.
When the heat sits
Normal highs reach 90°F from July 14 through August 24, covering 42 dates. The broader mild season, normal highs of 70°F or more, runs May 2 to October 14.
This counts calendar dates whose 1991–2020 normal high reaches 90°F. It is a smaller number than the 90°F+ day counts in the monthly table above, which measure how often the threshold was actually crossed in a typical year. A date can average 88°F and still exceed 90°F in half of all years.
No freezing date
Not one calendar date in the 1991–2020 record carries a normal low at or below 32°F. The coldest normal low of the year is 35°F around December 17.
The widest day
July 28 carries the biggest normal gap between afternoon and dawn, 40°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Illahe.
Where Illahe Stands Nationally
Day-to-night contrast is extreme by national standards — the widest normal daily swing reaches about 40°F, sharper than nine in ten ranked stations see.
Illahe 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
November 17
50% probability date
Last Spring Freeze
March 30
50% probability date
Growing Season
232 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
3,883
Higher = more heating needed
Cooling Degree Days
604
Higher = more cooling needed
Warmest Month
August
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside OR closest to Illahe 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 (56°F here).
- Beltsville, MD 56°F · 0.0°F off
- Chanute, KS 56°F · 0.0°F off
- Dodge City, KS 56°F · 0.0°F off
- Elizabethton, TN 56°F · 0.0°F off
Data-derived climate profile
How Illahe's climate pattern fits together
heating led · low swing
Heating is the larger measured load in Illahe, at 3,883 degree days versus 604 for cooling. Unlike a strongly continental record, however, its 28.4°F month-to-month range is compact; persistent cool-season demand matters more than a dramatic summer-to-winter reversal.
Illahe's frost-free season lasts about 232 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
Temperature varies within a narrow 28.4°F band across the normal year. August and December mark the typical warm and cold ends of the calendar. The annual average is 56°F. Monthly rows still matter, but they refine a steady profile rather than reveal two climatic extremes.
A moisture-range label is withheld because Illahe'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 Illahe'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 Illahe, not an official NOAA class or a year-ahead forecast.
Questions about Illahe's climate
How many days above 90°F does Illahe get? ▼
How much energy does heating and cooling require in Illahe? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Illahe's primary station: ILLAHE (USC00354133). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for Illahe; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for Illahe 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.