Bonham Reservoir, Colorado climate: Climate normals at a NOAA weather station
Bonham Reservoir's normal year runs from 5°F December nights to 68°F July afternoons, with 31.4 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 0.6°C, December lows of −15°C, July highs of 20°C, 797 mm of precipitation a year.
- NOAA stationBonham Reservoir
- Station IDUSC00050825
- Location39.10°N 107.90°W
- Elevation9,852 ft (3,003 m)
On October 23, the normal high in Bonham Reservoir is 43°F and the normal low 22°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Bonham Reservoir.
- Jan 26° 6°
- Feb 27° 4°
- Mar 34° 12°
- Apr 40° 17°
- May 49° 27°
- Jun 62° 37°
- Jul 68° 42°
- Aug 64° 40°
- Sep 57° 34°
- Oct 45° 24°
- Nov 34° 14°
- Dec 26° 5°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Bonham Reservoir each month?
July is the warmest month, with normal highs of 68°F; December the coldest, with normal lows of 5°F. The most precipitation falls in December (3.81 in), the least in June (1.11 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 26°F | 6°F | 16.1°F | 2.87 | – | <1 | 31 | 9 h 40 min |
| February | 27°F | 4°F | 15.4°F | 3.58 | – | <1 | 28 | 10 h 40 min |
| March | 34°F | 12°F | 23.1°F | 3.07 | – | <1 | 31 | 11 h 50 min |
| April | 40°F | 17°F | 28.7°F | 3.01 | – | <1 | 29 | 13 h 10 min |
| May | 49°F | 27°F | 38.1°F | 2.13 | – | <1 | 26 | 14 h 20 min |
| June | 62°F | 37°F | 49.3°F | 1.11 | – | <1 | 8 | 14 h 50 min |
| July | 68°F | 42°F | 55.0°F | 2.04 | – | <1 | 1 | 14 h 40 min |
| August | 64°F | 40°F | 51.9°F | 2.24 | – | <1 | 2 | 13 h 40 min |
| September | 57°F | 34°F | 45.7°F | 2.45 | – | <1 | 14 | 12 h 30 min |
| October | 45°F | 24°F | 34.7°F | 2.60 | – | <1 | 27 | 11 h 10 min |
| November | 34°F | 14°F | 23.8°F | 2.45 | – | <1 | 29 | 10 h |
| December | 26°F | 5°F | 15.2°F | 3.81 | – | <1 | 31 | 9 h 30 min |
| Year (annual) | 44°F | 22°F | 33.1°F | 31.36 | – | <1 | 256 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | −3°C | −14°C | −8.8°C | 73 mm |
| February | −3°C | −16°C | −9.2°C | 91 mm |
| March | 1°C | −11°C | −4.9°C | 78 mm |
| April | 4°C | −8°C | −1.8°C | 76 mm |
| May | 10°C | −3°C | 3.4°C | 54 mm |
| June | 17°C | 3°C | 9.6°C | 28 mm |
| July | 20°C | 6°C | 12.8°C | 52 mm |
| August | 18°C | 5°C | 11.1°C | 57 mm |
| September | 14°C | 1°C | 7.6°C | 62 mm |
| October | 7°C | −4°C | 1.5°C | 66 mm |
| November | 1°C | −10°C | −4.6°C | 62 mm |
| December | −3°C | −15°C | −9.3°C | 97 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Collbran (10 miles away), gets 60 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00050825; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
Which months are mildest at Bonham Reservoir?
Normal highs sit between 65°F and 85°F in July.
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00050825.
How hot and how cold does it get at Bonham Reservoir?
In a normal year in Bonham Reservoir, a 90°F day is rare and 256 nights fall to 32°F or colder.
- Days at 90°F or more
- fewer than 1a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 256a normal year
- Days that stay below freezing
- 102high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00050825.
How sunny is it at Bonham Reservoir?
Over a year 77% of the sunlight that would reach the ground under clear skies gets through the clouds at Bonham Reservoir, 4.8 kWh per square metre a day. June is the sunniest month (84%) and December the cloudiest (70%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 74% | 2.5 |
| February | 72% | 3.4 |
| March | 77% | 4.9 |
| April | 73% | 5.7 |
| May | 73% | 6.5 |
| June | 84% | 7.7 |
| July | 81% | 7.0 |
| August | 79% | 6.2 |
| September | 82% | 5.3 |
| October | 77% | 3.8 |
| November | 75% | 2.7 |
| December | 70% | 2.1 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How many heating and cooling degree days does Bonham Reservoir record?
A normal year at Bonham Reservoir brings 11,618 heating degree days, 2.2 times the median U.S. place (5,373), and 0 cooling degree days, 100% fewer than the median (908). Twelve months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 345 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,516 | 0 |
| February | 1,390 | 0 |
| March | 1,301 | 0 |
| April | 1,091 | 0 |
| May | 835 | 0 |
| June | 470 | 0 |
| July | 312 | 0 |
| August | 406 | 0 |
| September | 579 | 0 |
| October | 939 | 0 |
| November | 1,236 | 0 |
| December | 1,544 | 0 |
| Year (annual) | 11,618 | 0 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00050825. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Have recent years at Bonham Reservoir been warmer than normal?
2025 averaged 36.5°F, 3.4°F above the 1991-2020 normal of 33.1°F. 3 of the 3 complete years since 2022 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2022 | 33.6°F | +0.5°F | 33.11 |
| 2023 | 34.7°F | +1.6°F | 33.36 |
| 2025 | 36.5°F | +3.4°F | – |
Source: observed years: ACIS, station USC00050825. A year counts only with all twelve months complete.
How does Bonham Reservoir's climate compare?
Bonham Reservoir is warmer than 0 of the 125 places with their own NOAA record in Colorado, and wetter than 119. Across the 7,247 U.S. stations with normals, its annual mean of 33.1°F is warmer than 1%.
In the Köppen classification computed from these normals, Bonham Reservoir is Dsc: continental, dry-summer, cool summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Questions about Bonham Reservoir's climate
What is the coldest month at Bonham Reservoir?
December, with a normal high of 26°F and a normal low of 5°F. The warmest is July (68°F by day, 42°F at night).
Does it snow at Bonham Reservoir?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Collbran (10 miles away), records 60 inches of snow in a normal year.
What is the rainiest month at Bonham Reservoir?
December, with 3.81 in of precipitation in a normal year; the driest is June with 1.11 in.
What plant hardiness zone is Bonham Reservoir in?
The USDA's 2023 map puts Bonham Reservoir in zone 5b in ZIP code 81646, the nearest ZIP area.
Nearby and next
- Colorado climateThe statewide normals and every place in the state
- Collbran, CO10 miles from this station, 47.6°F a year
- Cedaredge, CO14 miles from this station, 48.8°F a year
- Paonia, CO23 miles from this station, 50.6°F a year
- Palisade, CO24 miles from this station, 54.4°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made