Ontario Ksrv, 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 Ontario Ksrv's primary NOAA station, ONTARIO KSRV.
The climate verdict for Ontario Ksrv
Dryness leads the climate profile for Ontario Ksrv, Oregon, with 10.0 inches of precipitation a year. NOAA records an annual average of 52°F. At 40/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 6% of scores.
- 52°F
- average temperature, NOAA 1991-2020 normal
- 40/100
- comfort score, above 6% of station-mapped location scores
- 10.0"
- precipitation, annual total
- 170 days
- growing season, frost-free days
Ontario Ksrv: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00356294 · Ontario Ksrv, OR 52°F mean · 10.0" precip
TEMP-COOL · RANK-MID · PHOTO-FINISH · PRCP-ARID · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 52°F
- RANK-MID #3,225
- PHOTO-FINISH ≈ Lafayette
- PRCP-ARID 10.0"
- SWING-WIDE 48°F
- COMF-LOW 40/100
- LOAD-HEAT 5,788 HDD
- STN-1 USC00356294
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Lafayette, IN (+ 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.
- Ontario Ksrv (this station) 52°F
- Hot Burlington, CO 52°F
- Near Lafayette, IN 52°F
- Near Eskdale, UT 52°F
- Cold Ogden NE Bench, UT 51°F
Climate Living Index · Ontario Ksrv
Ontario Ksrv: 31/100 · grade F
Ontario Ksrv publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Ontario Ksrv, not an official NOAA rating. Rankings still use Comfort Score 40/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Annual temperature balance | 51.6°F · 15.9° from 67.5°F | 47/100 · D |
| Frost-free season | 170 days/year | 42/100 · D |
| Normal heat + freeze calendar | 188 calendar days | 21/100 · F |
| Precipitation balance | 10.0 in · 25.0 from 35 in | 12/100 · F |
Ontario Ksrv · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Ontario Ksrv's normals sit in a dry climate class: BSk
Precipitation is low relative to temperature but above true desert thresholds: cold semi-arid steppe (BSk). Class BSk is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: dry (arid or semi-arid), specifically cold semi-arid steppe.
- Köppen code
- BSk
- Group
- Dry (arid or semi-arid)
- Warmest month
- 76.8°F
- Coldest month
- 29.2°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 Ontario Ksrv sits across the climate record
Three NOAA fields for Ontario Ksrv's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 47th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Drier than 94%
- Ontario Ksrv's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Wider than 71%
- Warmest-to-coldest month gap for Ontario Ksrv is large versus 6,861 complete station-years.
How Ontario Ksrv compares across U.S. station-mapped locations
Ontario Ksrv's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
40 6th percentile score exceeds 6% 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%). This entry sits in this band.
- 50–60: 1,329 station-mapped locations (21%). Above this entry.
- 60–70: 1,236 station-mapped locations (20%). Above this entry.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 36°F (2°C) | 23°F (-5°C) | 29°F (-2°C) | 1.3" | 29.4 | 0.0 |
| February | 44°F (6°C) | 26°F (-3°C) | 35°F (2°C) | 0.8" | 25.5 | 0.0 |
| March | 56°F (13°C) | 32°F (0°C) | 44°F (7°C) | 1.0" | 19.9 | 0.0 |
| April | 63°F (17°C) | 38°F (3°C) | 51°F (10°C) | 0.9" | 9.0 | 0.0 |
| May | 74°F (23°C) | 47°F (8°C) | 60°F (16°C) | 1.4" | 1.0 | 2.1 |
| June | 82°F (28°C) | 54°F (12°C) | 68°F (20°C) | 0.7" | 0.0 | 7.2 |
| July | 93°F (34°C) | 60°F (16°C) | 77°F (25°C) | 0.3" | 0.0 | 23.5 |
| August | 91°F (33°C) | 57°F (14°C) | 74°F (23°C) | 0.1" | 0.0 | 21.7 |
| September | 81°F (27°C) | 47°F (8°C) | 64°F (18°C) | 0.3" | 1.0 | 7.0 |
| October | 65°F (18°C) | 36°F (2°C) | 50°F (10°C) | 0.8" | 12.4 | 0.3 |
| November | 47°F (8°C) | 28°F (-2°C) | 37°F (3°C) | 0.9" | 23.2 | 0.0 |
| December | 36°F (2°C) | 22°F (-5°C) | 29°F (-1°C) | 1.6" | 28.5 | 0.0 |
The year, day by day
Ontario Ksrv works both ends of the calendar. Normal highs climb to 96°F by July 25 and hold at or above 90°F on 48 dates, then normal lows drop to freezing or below on 140 dates, bottoming at 21°F around December 25.
When the heat sits
Normal highs reach 90°F from July 5 through August 21, covering 48 dates. The broader mild season, normal highs of 70°F or more, runs May 5 to October 7.
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.
The freezing stretch
The normal low stays at or below 32°F into March 15, then returns to freezing around October 28, covering 140 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.
Where the wet dates fall
The likeliest wet date is December 20, when 34% of years recorded at least a hundredth of an inch. The driest is August 20 at 5%. Summed across the calendar, that is about 71 wet dates a year.
The widest day
August 3 carries the biggest normal gap between afternoon and dawn, 35°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Ontario Ksrv.
Where Ontario Ksrv Stands Nationally
Aridity defines the water calendar: about 10 inches in a normal year lands this among the driest tenth of ranked stations.
Daily temperature swings run wider than most of the country, peaking near 35°F between the normal high and low.
Ontario Ksrv earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall
8.2 days with precipitation
5.7 days with precipitation
7.8 days with precipitation
7.7 days with precipitation
6.9 days with precipitation
4.1 days with precipitation
1.8 days with precipitation
1.3 days with precipitation
2.3 days with precipitation
4.4 days with precipitation
8.8 days with precipitation
10.6 days with precipitation
Ontario Ksrv's wet season runs through the cold months
December, January and February carry 37% of the year's precipitation here, while June through August contribute 10%. 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 a wide 47.6°F gap between its warmest and coldest month.
- Wettest month
- December, 1.6"
- Driest month
- August, 0.1"
- Wettest three months
- December, May, January (43% 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.
Ontario Ksrv is dry, and what does fall arrives gently
Only about 70 days a year record measurable precipitation here, 19% of the calendar, and they carry 10.0" between them. At roughly 0.14 inches on an average wet day, this is not the damp drizzle of a marine climate; it is an arid record in which precipitation is both uncommon and light when it appears.
The wettest month by count is December at about 11 wet days; the driest is August at about 1.
A low per-event average in a dry record is a statement about typical days only. Arid regions can still take a large share of a year's total from a single convective storm, which a normal cannot show.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, not the extremes within it.
Frost Dates & Growing Season
First Fall Freeze
October 9
50% probability date
Last Spring Freeze
April 22
50% probability date
Growing Season
170 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
5,788
Higher = more heating needed
Cooling Degree Days
921
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside OR closest to Ontario Ksrv 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 (52°F here).
- Amity, MO 52°F · 0.0°F off
- Carmel, IN 52°F · 0.0°F off
- Eau Claire, MI 52°F · 0.0°F off
- Fairbury, NE 52°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (10.0" here), excluding temperature-peer places.
- Chino, CA 10.0" · 0.0" off
- Cubero, NM 10.0" · 0.0" off
- Truth OR Consequences, NM 10.0" · 0.0" off
- Picacho, AZ 9.9" · 0.0" off
Scarce-water calendar
Where Ontario Ksrv's limited precipitation lands
heating led · dry · mid swing
Ontario Ksrv's energy balance leans toward cold weather: 5,788 annual heating degree days against 921 for cooling. Its 47.6°F seasonal range still makes the monthly rows more useful than the annual average alone.
Ontario Ksrv's frost-free season lasts about 170 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
July and January mark the typical warm and cold ends of the calendar in Ontario Ksrv's middle-range seasonal profile. The measured spread is 47.6°F. The annual average is 52°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Ontario Ksrv's cold-season load does not imply a wet climate. Annual precipitation is 10.0 inches, which places the station in PlainClimate's dry range. Snowfall is not added to the interpretation because its annual value is missing. The snowfall and rainfall fields should be read separately rather than inferred from temperature.
Ontario Ksrv wettest normal
December
December concentrates the scarce annual total (10.0 inches).
Ontario Ksrv driest normal
August
August is typically driest; arid stations are defined by when water is absent, not by a four-season grid.
Questions about Ontario Ksrv's climate
How dry is Ontario Ksrv? ▼
How many days above 90°F does Ontario Ksrv get? ▼
How much energy does heating and cooling require in Ontario Ksrv? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Ontario Ksrv's primary station: ONTARIO KSRV (USC00356294). 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 Ontario Ksrv; 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 Ontario Ksrv 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.