Vernonia, 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 Vernonia's primary NOAA station, VERNONIA #2.
The climate verdict for Vernonia
Water is the standout signal in Vernonia, Oregon: 48.0 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 49°F. Its climate comfort score of 69/100 (good) lands mid-pack nationally, exceeding 65% of station-mapped location scores.
- 49°F
- yearly average temperature, NOAA normal
- 69/100
- comfort score, above 65% of station-mapped location scores
- 48.0"
- annual precipitation · 1" snow
- 146 days
- frost-free days per growing season
Vernonia: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00358884 · Vernonia, OR 49°F mean · 48.0" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-MID · SWING-NARROW · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 49°F
- RANK-COOL #2,539
- PHOTO-FINISH ≈ Monroe
- PRCP-MID 48.0"
- SWING-NARROW 25°F
- COMF-MID 69/100
- LOAD-HEAT 5,772 HDD
- STN-1 USC00358884
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Monroe, WA (+ 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 OR station list.
- Hot Darrington, WA 50°F
- Near Monroe, WA 50°F
- Near Baring, WA 50°F
- Vernonia (this station) 49°F
- Cold Arlington, WA 49°F
Climate Living Index · Vernonia
Vernonia: 56/100 · grade C
Vernonia publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Vernonia, not an official NOAA rating. Rankings still use Comfort Score 69/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Snowfall burden | 1.1 inches/year | 82/100 · B |
| Normal heat + freeze calendar | 93 calendar days | 78/100 · B |
| Precipitation balance | 48.0 in · 13.0 from 35 in | 54/100 · D |
| Annual temperature balance | 49.4°F · 18.1° from 67.5°F | 38/100 · F |
| Frost-free season | 146 days/year | 22/100 · F |
Vernonia · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Vernonia is a temperate Köppen climate: Csb
Coldest-month mean 37.8°F and warmest-month mean 62.5°F place this station in temperate, dry-summer, warm summer climates (Csb). Class Csb is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, dry-summer, warm summer.
- Köppen code
- Csb
- Group
- Temperate
- Warmest month
- 62.5°F
- Coldest month
- 37.8°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 Vernonia sits across the climate record
Three NOAA fields for Vernonia's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 37th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Top 24% wettest
- Vernonia's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 95%
- Warmest-to-coldest month gap for Vernonia is compact versus 6,861 complete station-years.
How Vernonia compares across U.S. station-mapped locations
Vernonia's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
69 Top 35% score exceeds 65% 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%). This entry sits in this band.
- 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
Vernonia's measured station temperature trend
MethodologyAcross 48 complete annual observations from 1968 to 2025, VERNONIA #2 warmed at a fitted rate of 0.23°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Vernonia primary station fitted change +0.23 °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 | 46°F (8°C) | 32°F (0°C) | 39°F (4°C) | 6.9" | 0.3" | 16.7 | 0.0 |
| February | 49°F (10°C) | 31°F (-1°C) | 40°F (5°C) | 5.3" | 0.6" | 16.8 | 0.0 |
| March | 54°F (12°C) | 34°F (1°C) | 44°F (6°C) | 5.3" | 0.0" | 15.1 | 0.0 |
| April | 59°F (15°C) | 36°F (2°C) | 47°F (8°C) | 3.7" | 0.0" | 9.3 | 0.0 |
| May | 66°F (19°C) | 40°F (5°C) | 53°F (12°C) | 2.4" | 0.0" | 3.1 | 0.4 |
| June | 70°F (21°C) | 44°F (7°C) | 57°F (14°C) | 1.4" | 0.0" | 0.0 | 0.8 |
| July | 77°F (25°C) | 47°F (8°C) | 62°F (17°C) | 0.4" | 0.0" | 0.0 | 2.8 |
| August | 78°F (26°C) | 47°F (8°C) | 63°F (17°C) | 0.6" | 0.0" | 0.0 | 2.8 |
| September | 73°F (23°C) | 43°F (6°C) | 58°F (14°C) | 1.8" | 0.0" | 1.6 | 1.2 |
| October | 61°F (16°C) | 38°F (3°C) | 50°F (10°C) | 4.1" | 0.0" | 7.2 | 0.0 |
| November | 51°F (10°C) | 34°F (1°C) | 42°F (6°C) | 7.7" | 0.0" | 11.9 | 0.0 |
| December | 44°F (7°C) | 31°F (0°C) | 38°F (3°C) | 8.3" | 0.2" | 17.2 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 79°F around July 30, short of 90°F on every date, while 93 dates carry a normal low at or below freezing, the coldest 31°F near February 11.
The freezing stretch
The normal low stays at or below 32°F into March 3, then returns to freezing around December 2, covering 93 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 November 29, when 67% of years recorded at least a hundredth of an inch. The driest is July 31 at 10%. Summed across the calendar, that is about 166 wet dates a year.
The widest day
July 30 carries the biggest normal gap between afternoon and dawn, 31°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Vernonia.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 0.3"
20.0 days with precipitation
Snow: 0.6"
16.8 days with precipitation
19.5 days with precipitation
17.4 days with precipitation
12.4 days with precipitation
9.5 days with precipitation
3.7 days with precipitation
3.5 days with precipitation
7.8 days with precipitation
14.8 days with precipitation
19.8 days with precipitation
Snow: 0.2"
20.0 days with precipitation
Vernonia's wet season runs through the cold months
December, January and February carry 43% 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 24.7°F seasonal spread.
- Wettest month
- December, 8.3"
- Driest month
- July, 0.4"
- Wettest three months
- December, November, January (48% 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 Vernonia's precipitation splits across the calendar
About 165 days a year record measurable precipitation here, carrying 48.0" between them, or roughly 0.29 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 Vernonia, but rarely amounts to much
The normals record 1.1 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
October 1
50% probability date
Last Spring Freeze
May 8
50% probability date
Growing Season
146 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
5,772
Higher = more heating needed
Cooling Degree Days
84
Higher = more cooling needed
Warmest Month
August
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside OR closest to Vernonia 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 (49°F here).
- Adrian, MI 49°F · 0.0°F off
- Albany, NY 49°F · 0.0°F off
- Callaway, NE 49°F · 0.0°F off
- Capulin, NM 49°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (48.0" here), excluding temperature-peer places.
- Brenham, TX 48.0" · 0.0" off
- Elizabethton, TN 48.0" · 0.0" off
- Beverly, MA 48.0" · 0.0" off
- Marblehead, MA 48.0" · 0.0" off
Data-derived climate profile
How Vernonia's climate pattern fits together
heating led · wet · low swing
Heating is the larger measured load in Vernonia, at 5,772 degree days versus 84 for cooling. Unlike a strongly continental record, however, its 24.7°F month-to-month range is compact; persistent cool-season demand matters more than a dramatic summer-to-winter reversal.
Only about 146 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.
Vernonia's 24.7°F seasonal spread is compact even though precipitation is abundant. August and December mark the typical warm and cold ends of the calendar. The annual average is 49°F. Temperature is relatively steady; the monthly rows show how rain and snow observations vary across the calendar.
Alongside its heating load, Vernonia carries 48.0 inches of precipitation in a normal year, inside PlainClimate's wet range. Annual snowfall totals 1.1 inches. That distinction matters because a wet annual total can arrive as rain, snow, or a mixture at different times.
These labels group NOAA 1991-2020 normals from Vernonia'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 Vernonia, not an official NOAA class or a year-ahead forecast.
Questions about Vernonia's climate
How much rain does Vernonia get? ▼
How cold does Vernonia get in winter? ▼
How much energy does heating and cooling require in Vernonia? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Vernonia's primary station: VERNONIA #2 (USC00358884). 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 4177250). Match rule for Vernonia: 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 Vernonia 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.