Vallecito Reservoir, CO Climate: Temperature by Month
Pulled from NOAA NCEI 1991–2020 normals →: climate measurements used in PlainClimate's documented score
30-year climate normals (1991-2020) from Vallecito Reservoir's primary NOAA station, VALLECITO RESERVOIR.
The climate verdict for Vallecito Reservoir
Vallecito Reservoir, Colorado has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 45°F. July is the warmest month at 67°F and January the coldest at 23°F.
- 45°F
- yearly average temperature, NOAA normal
- 146 days
- frost-free growing season
Vallecito Reservoir: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00058590 · Vallecito Reservoir, CO 45°F mean
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-UNK · SWING-MID · COMF-UNK · LOAD-HEAT · STN-1 · BOOK-PART
- TEMP-COOL 45°F
- RANK-COOL #1,304
- PHOTO-FINISH ≈ Chiloquin
- PRCP-UNK Rain n/a
- SWING-MID 44°F
- COMF-UNK Comfort n/a
- LOAD-HEAT 7,358 HDD
- STN-1 USC00058590
- BOOK-PART 4/6 fields
Nearest mean-temperature peer: Chiloquin, 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 CO station list.
- Vallecito Reser… (this station) 45°F
- Hot Cerro, NM 45°F
- Near Chiloquin, OR 45°F
- Near Heron, MT 45°F
- Near Spring Valley S…, NV 45°F
Climate Living Index · Vallecito Reservoir
Vallecito Reservoir: 23/100 · grade F
Vallecito Reservoir publishes 3 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 3 missing weights rescale to 100.
PlainClimate-derived for Vallecito Reservoir, not an official NOAA rating. Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 179 calendar days | 26/100 · F |
| Frost-free season | 146 days/year | 22/100 · F |
| Annual temperature balance | 45.0°F · 22.5° from 67.5°F | 20/100 · F |
Vallecito Reservoir · 2026-08-04 · NOAA NCEI Climate Normals · method .
National standing · heating-led station
Where Vallecito Reservoir sits across the climate record
Available NOAA 1991–2020 fields for Vallecito Reservoir are ranked only against stations that publish the same field, missing metrics stay blank rather than estimated.
- Annual temperature
- Cooler than 81%
- Among 6,861 stations, Vallecito Reservoir sits in the cooler third of annual means.
- Seasonal temperature swing
- 51st 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 | 37°F (3°C) | 9°F (-13°C) | 23°F (-5°C) | N/A | 31.0 | 0.0 |
| February | 42°F (5°C) | 12°F (-11°C) | 27°F (-3°C) | N/A | 28.0 | 0.0 |
| March | 48°F (9°C) | 21°F (-6°C) | 35°F (2°C) | N/A | 31.0 | 0.0 |
| April | 55°F (13°C) | 29°F (-2°C) | 42°F (6°C) | N/A | 20.8 | 0.0 |
| May | 64°F (18°C) | 37°F (3°C) | 51°F (10°C) | N/A | 5.0 | 0.0 |
| June | 76°F (24°C) | 44°F (7°C) | 60°F (16°C) | N/A | 1.0 | 0.0 |
| July | 80°F (27°C) | 53°F (12°C) | 67°F (19°C) | N/A | 0.0 | 0.5 |
| August | 78°F (26°C) | 51°F (11°C) | 65°F (18°C) | N/A | 0.0 | 0.0 |
| September | 72°F (22°C) | 45°F (7°C) | 59°F (15°C) | N/A | 0.0 | 0.0 |
| October | 60°F (16°C) | 38°F (3°C) | 49°F (9°C) | N/A | 11.8 | 0.0 |
| November | 47°F (8°C) | 25°F (-4°C) | 36°F (2°C) | N/A | 25.5 | 0.0 |
| December | 39°F (4°C) | 17°F (-9°C) | 28°F (-2°C) | N/A | 31.0 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 81°F around July 6, short of 90°F on every date, while 179 dates carry a normal low at or below freezing, the coldest 7°F near January 25.
The freezing stretch
The normal low stays at or below 32°F into April 25, then returns to freezing around October 30, covering 179 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
June 20 carries the biggest normal gap between afternoon and dawn, 33°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Vallecito Reservoir.
Where Vallecito Reservoir Stands Nationally
Freezing is routine here by normals standards — the normal low reaches 32°F or colder on about 179 nights a year, more than most ranked stations.
Daily temperature swings run wider than most of the country, peaking near 33°F between the normal high and low.
Vallecito Reservoir 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
October 11
50% probability date
Last Spring Freeze
May 18
50% probability date
Growing Season
146 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
7,358
Higher = more heating needed
Cooling Degree Days
97
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside CO closest to Vallecito Reservoir 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 (45°F here).
- Alexandria, SD 45°F · 0.0°F off
- Bangor, ME 45°F · 0.0°F off
- Busby, MT 45°F · 0.0°F off
- Chiloquin, OR 45°F · 0.0°F off
Data-derived climate profile
How Vallecito Reservoir's climate pattern fits together
heating led · mid swing
Vallecito Reservoir's energy balance leans toward cold weather: 7,358 annual heating degree days against 97 for cooling. Its 43.5°F seasonal range still makes the monthly rows more useful than the annual average alone.
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.
July and January mark the typical warm and cold ends of the calendar in Vallecito Reservoir's middle-range seasonal profile. The measured spread is 43.5°F. The annual average is 45°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
A moisture-range label is withheld because Vallecito Reservoir'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 Vallecito Reservoir'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 Vallecito Reservoir, not an official NOAA class or a year-ahead forecast.
Questions about Vallecito Reservoir's climate
How cold does Vallecito Reservoir get in winter? ▼
How much energy does heating and cooling require in Vallecito Reservoir? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Vallecito Reservoir's primary station: VALLECITO RESERVOIR (USC00058590). 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 Vallecito Reservoir; 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 Vallecito Reservoir 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.