Rockville, 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 Rockville's primary NOAA station, ROCKVILLE 5 N.
The climate verdict for Rockville
Rockville, Oregon has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 48°F. July is the warmest month at 70°F and December the coldest at 30°F.
- 48°F
- annual average temperature (NOAA normal)
- 108 days
- growing season, frost-free days
Rockville: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00357277 · Rockville, OR 48°F mean
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-UNK · SWING-MID · COMF-UNK · LOAD-HEAT · STN-1 · BOOK-PART
- TEMP-COOL 48°F
- RANK-COOL #2,264
- PHOTO-FINISH ≈ Shoshone
- PRCP-UNK Rain n/a
- SWING-MID 40°F
- COMF-UNK Comfort n/a
- LOAD-HEAT 6,441 HDD
- STN-1 USC00357277
- BOOK-PART 4/6 fields
Nearest mean-temperature peer: Shoshone, NV ( -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 Lybrook, NM 49°F
- Rockville (this station) 48°F
- Cold Star Lake, NM 48°F
- Near Shoshone, NV 48°F
- Near Johnson Rch, NM 48°F
Climate Living Index · Rockville
Rockville: 16/100 · grade F
Rockville publishes 3 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 3 missing weights rescale to 100.
PlainClimate-derived for Rockville, not an official NOAA rating. Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Annual temperature balance | 48.3°F · 19.2° from 67.5°F | 33/100 · F |
| Normal heat + freeze calendar | 220 calendar days | 5/100 · F |
| Frost-free season | 108 days/year | 2/100 · F |
Rockville · 2026-08-04 · NOAA NCEI Climate Normals · method .
National standing · heating-led station
Where Rockville sits across the climate record
Available NOAA 1991–2020 fields for Rockville are ranked only against stations that publish the same field, missing metrics stay blank rather than estimated.
- Annual temperature
- 33rd percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Seasonal temperature swing
- 36th percentile swing
- Typical seasonal amplitude 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 | 39°F (4°C) | 22°F (-6°C) | 30°F (-1°C) | N/A | 28.0 | 0.0 |
| February | 44°F (7°C) | 25°F (-4°C) | 34°F (1°C) | N/A | 24.7 | 0.0 |
| March | 54°F (12°C) | 28°F (-2°C) | 41°F (5°C) | N/A | 24.4 | 0.0 |
| April | 62°F (17°C) | 32°F (0°C) | 47°F (8°C) | N/A | 18.0 | 0.0 |
| May | 71°F (22°C) | 39°F (4°C) | 55°F (13°C) | N/A | 8.3 | 0.6 |
| June | 80°F (27°C) | 44°F (7°C) | 62°F (17°C) | N/A | 2.0 | 4.6 |
| July | 91°F (33°C) | 49°F (10°C) | 70°F (21°C) | N/A | 0.0 | 18.1 |
| August | 89°F (31°C) | 48°F (9°C) | 68°F (20°C) | N/A | 0.6 | 15.9 |
| September | 78°F (25°C) | 39°F (4°C) | 59°F (15°C) | N/A | 7.2 | 1.8 |
| October | 63°F (17°C) | 31°F (0°C) | 47°F (8°C) | N/A | 19.1 | 0.0 |
| November | 48°F (9°C) | 25°F (-4°C) | 36°F (2°C) | N/A | 24.1 | 0.0 |
| December | 38°F (3°C) | 21°F (-6°C) | 30°F (-1°C) | N/A | 28.4 | 0.0 |
The year, day by day
Rockville works both ends of the calendar. Normal highs climb to 93°F by July 24 and hold at or above 90°F on 33 dates, then normal lows drop to freezing or below on 187 dates, bottoming at 21°F around December 25.
When the heat sits
Normal highs reach 90°F from July 11 through August 12, covering 33 dates. The broader mild season, normal highs of 70°F or more, runs May 14 to October 2.
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 April 16, then returns to freezing around October 13, covering 187 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
July 22 carries the biggest normal gap between afternoon and dawn, 42°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Rockville.
Where Rockville Stands Nationally
Day-to-night contrast is extreme by national standards — the widest normal daily swing reaches about 42°F, sharper than nine in ten ranked stations see.
Freezing is routine here by normals standards — the normal low reaches 32°F or colder on about 187 nights a year, more than most ranked stations.
Rockville earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall
Frost Dates & Growing Season
First Fall Freeze
September 14
50% probability date
Last Spring Freeze
May 29
50% probability date
Growing Season
108 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,441
Higher = more heating needed
Cooling Degree Days
375
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside OR closest to Rockville 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 (48°F here).
- Albin, WY 48°F · 0.0°F off
- Albion, NE 48°F · 0.0°F off
- Angola, IN 48°F · 0.0°F off
- Beverly, MA 48°F · 0.0°F off
Data-derived climate profile
How Rockville's climate pattern fits together
heating led · mid swing
Rockville's energy balance leans toward cold weather: 6,441 annual heating degree days against 375 for cooling. Its 40.1°F seasonal range still makes the monthly rows more useful than the annual average alone.
Only about 108 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.
July and December mark the typical warm and cold ends of the calendar in Rockville's middle-range seasonal profile. The measured spread is 40.1°F. The annual average is 48°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
A moisture-range label is withheld because Rockville'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 Rockville'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 Rockville, not an official NOAA class or a year-ahead forecast.
Questions about Rockville's climate
How many days above 90°F does Rockville get? ▼
How much energy does heating and cooling require in Rockville? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Rockville's primary station: ROCKVILLE 5 N (USC00357277). 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 Rockville; 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 Rockville 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.