Riddle, OR Climate: Temperature & Rain by Month
Pulled from NOAA NCEI 1991–2020 normals →: climate measurements used in PlainClimate's documented score
30-year climate normals (1991-2020) from Riddle's primary NOAA station, RIDDLE.
The climate verdict for Riddle
A compact 28°F seasonal swing gives Riddle, Oregon a steadier-than-extreme annual shape. NOAA reports an annual average of 57°F. It scores 83/100 for climate comfort (excellent), putting it in the top third of station-mapped location scores and exceeding 81% of them.
- 57°F
- annual average temperature (NOAA normal)
- 83/100
- comfort score, above 81% of station-mapped location scores
- 31.1"
- annual precipitation · 2" snow
- 220 days
- growing season, frost-free days
Riddle: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00357169 · Riddle, OR 57°F mean · 31.1" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-MID · SWING-NARROW · COMF-TOP · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-MILD 57°F
- RANK-UPPER #4,528
- PHOTO-FINISH ≈ Clearlake
- PRCP-MID 31.1"
- SWING-NARROW 28°F
- COMF-TOP 83/100
- LOAD-HEAT 3,630 HDD
- STN-1 USC00357169
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Clearlake, CA (+ 0.2 °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.
- Riddle (this station) 57°F
- Hot Skyline Ridge P…, CA 57°F
- Near Clearlake, CA 57°F
- Near Portal, AZ 57°F
- Cold Richardson GR S…, CA 56°F
Climate Living Index · Riddle
Riddle: 81/100 · grade B
Riddle publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Riddle, not an official NOAA rating. Rankings still use Comfort Score 83/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 13 calendar days | 99/100 · A |
| Precipitation balance | 31.1 in · 3.9 from 35 in | 86/100 · A |
| Frost-free season | 220 days/year | 77/100 · B |
| Snowfall burden | 1.9 inches/year | 76/100 · B |
| Annual temperature balance | 56.7°F · 10.8° from 67.5°F | 65/100 · C |
Riddle · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Riddle is a temperate Köppen climate: Csa
Coldest-month mean 43.7°F and warmest-month mean 71.7°F place this station in temperate, dry-summer, hot summer climates (Csa). Class Csa is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, dry-summer, hot summer.
- Köppen code
- Csa
- Group
- Temperate
- Warmest month
- 71.7°F
- Coldest month
- 43.7°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Riddle sits across the climate record
Three NOAA fields for Riddle's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 66th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- 41st percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Narrower than 93%
- Warmest-to-coldest month gap for Riddle is compact versus 6,861 complete station-years.
How Riddle compares across U.S. station-mapped locations
Riddle's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
83 Top 19% score exceeds 81% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). Below this entry.
- 70–80: 650 station-mapped locations (11%). Below this entry.
- 80–90: 921 station-mapped locations (15%). This entry sits in this band.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Riddle's measured station temperature trend
MethodologyAcross 91 complete annual observations from 1893 to 2024, RIDDLE warmed at a fitted rate of 0.15°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Riddle primary station fitted change +0.15 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 53°F (12°C) | 37°F (3°C) | 45°F (7°C) | 4.7" | 0.5" | 7.9 | 0.0 |
| February | 57°F (14°C) | 37°F (3°C) | 47°F (8°C) | 3.4" | 0.7" | 6.4 | 0.0 |
| March | 62°F (16°C) | 39°F (4°C) | 50°F (10°C) | 3.4" | 0.1" | 4.6 | 0.0 |
| April | 66°F (19°C) | 41°F (5°C) | 54°F (12°C) | 2.5" | 0.0" | 1.3 | 0.2 |
| May | 74°F (23°C) | 47°F (8°C) | 60°F (16°C) | 1.9" | 0.0" | 0.2 | 1.3 |
| June | 80°F (26°C) | 51°F (11°C) | 65°F (19°C) | 1.0" | 0.0" | 0.0 | 2.7 |
| July | 88°F (31°C) | 55°F (13°C) | 72°F (22°C) | 0.3" | 0.0" | 0.0 | 11.5 |
| August | 89°F (32°C) | 54°F (12°C) | 71°F (22°C) | 0.3" | 0.0" | 0.0 | 12.1 |
| September | 84°F (29°C) | 49°F (9°C) | 66°F (19°C) | 0.7" | 0.0" | 0.0 | 6.8 |
| October | 71°F (22°C) | 43°F (6°C) | 57°F (14°C) | 2.3" | 0.0" | 1.8 | 0.8 |
| November | 58°F (14°C) | 41°F (5°C) | 49°F (10°C) | 4.6" | 0.0" | 3.5 | 0.0 |
| December | 51°F (10°C) | 37°F (3°C) | 44°F (7°C) | 6.2" | 0.6" | 7.4 | 0.0 |
The year, day by day
The year in Riddle runs from a mild 36°F around December 21 to 90°F at the peak near July 27, and the normal low never reaches freezing on any date in the record.
When the heat sits
Normal highs reach 90°F from July 24 through August 5, covering 13 dates. The broader mild season, normal highs of 70°F or more, runs May 1 to October 17.
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 36°F around December 21.
Where the wet dates fall
The likeliest wet date is December 1, when 67% of years recorded at least a hundredth of an inch. The driest is July 31 at 5%. Summed across the calendar, that is about 148 wet dates a year.
The widest day
September 4 carries the biggest normal gap between afternoon and dawn, 36°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Riddle.
Where Riddle Stands Nationally
Daily temperature swings run wider than most of the country, peaking near 36°F between the normal high and low.
Riddle 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 and snowfall
Snow: 0.5"
19.4 days with precipitation
Snow: 0.7"
16.6 days with precipitation
Snow: 0.1"
17.9 days with precipitation
15.8 days with precipitation
11.5 days with precipitation
6.4 days with precipitation
1.9 days with precipitation
1.8 days with precipitation
4.9 days with precipitation
11.8 days with precipitation
18.9 days with precipitation
Snow: 0.6"
20.4 days with precipitation
Riddle's wet season runs through the cold months
December, January and February carry 46% of the year's precipitation here, while June through August contribute 5%. That is the cool-season-dominant pattern of the West Coast and the higher inland West, where storm tracks swing south in winter and summer turns dry; the thermometer meanwhile shows an unusually narrow 28°F seasonal spread.
- Wettest month
- December, 6.2"
- Driest month
- July, 0.3"
- Wettest three months
- December, January, November (50% of the year)
Shares are computed from this station's own 1991-2020 monthly precipitation normals. A cool-season label means the December-February share reaches 35%. Where snow falls, the monthly figures above report liquid-equivalent precipitation, so a wet winter month is not necessarily a rainy one.
How Riddle's precipitation splits across the calendar
About 147 days a year record measurable precipitation here, carrying 31.1" between them, or roughly 0.21 inches on a typical wet day. That sits in the middle band: neither the many-light-days pattern of the Pacific Northwest and the Great Lakes, nor the few-heavy-events pattern of the Gulf and the desert Southwest.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year and say nothing about the heaviest single storm on record.
Snow reaches Riddle, but rarely amounts to much
The normals record 1.9 inches of snow a year here, most likely in February. That is a real but marginal amount: enough that snow is part of the local record, not enough to define the winter.
A figure in this range usually reflects a handful of events that melt quickly rather than a season of accumulation; about 1 days a year record any measurable snow at all.
NOAA 1991-2020 normals. An average across thirty years can smooth away a single heavy winter, so a small annual figure does not mean a significant snowfall is impossible.
Frost Dates & Growing Season
First Fall Freeze
November 6
50% probability date
Last Spring Freeze
March 31
50% probability date
Growing Season
220 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
3,630
Higher = more heating needed
Cooling Degree Days
628
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside OR closest to Riddle 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 (57°F here).
- Arnett, OK 57°F · 0.0°F off
- Bethpage, TN 57°F · 0.0°F off
- Haysville, KS 57°F · 0.0°F off
- Joplin, MO 57°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (31.1" here), excluding temperature-peer places.
- Hebron, NE 31.1" · 0.0" off
- Kewaunee, WI 31.1" · 0.0" off
- New Ulm, MN 31.1" · 0.0" off
- Sheldon, IA 31.1" · 0.0" off
Data-derived climate profile
How Riddle's climate pattern fits together
heating led · moderate · low swing
Heating is the larger measured load in Riddle, at 3,630 degree days versus 628 for cooling. Unlike a strongly continental record, however, its 28.0°F month-to-month range is compact; persistent cool-season demand matters more than a dramatic summer-to-winter reversal.
Riddle's frost-free season lasts about 220 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 28.0°F band across the normal year. July and December mark the typical warm and cold ends of the calendar. The annual average is 57°F. Monthly rows still matter, but they refine a steady profile rather than reveal two climatic extremes.
Riddle's 31.1 inches of annual precipitation falls in PlainClimate's middle band, so “wet” or “dry” is not the leading description. Annual snowfall totals 1.9 inches. Temperature balance and the calendar distribution carry more information than the annual moisture label alone.
These labels group NOAA 1991-2020 normals from Riddle'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 Riddle, not an official NOAA class or a year-ahead forecast.
Questions about Riddle's climate
How much rain does Riddle get? ▼
How many days above 90°F does Riddle get? ▼
How much energy does heating and cooling require in Riddle? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Riddle's primary station: RIDDLE (USC00357169). 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 4161850). Match rule for Riddle: 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 Riddle 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.