Black River Pumps, Arizona climate: Climate normals at a NOAA weather station
Black River Pumps's normal year runs from 20°F January nights to 89°F July afternoons, with 18.7 inches of precipitation and 14 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 11.6°C, January lows of −7°C, July highs of 31°C, 474 mm of precipitation a year.
- NOAA stationBlack River Pumps
- Station IDUSC00020808
- Location33.48°N 109.75°W
- Elevation6,065 ft (1,849 m)
On October 24, the normal high in Black River Pumps is 70°F and the normal low 33°F, and the chance of measurable rain or snow is 14%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Black River Pumps.
- Jan 52° 20°
- Feb 55° 22°
- Mar 61° 27°
- Apr 68° 31°
- May 77° 39°
- Jun 88° 49°
- Jul 89° 55°
- Aug 86° 55°
- Sep 81° 49°
- Oct 72° 36°
- Nov 61° 27°
- Dec 52° 20°
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 Black River Pumps each month?
July is the warmest month, with normal highs of 89°F; January the coldest, with normal lows of 20°F. The most precipitation falls in July (3.26 in), the least in April (0.48 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 52°F | 20°F | 35.9°F | 1.90 | 3.7 | 6 | <1 | 30 | 10 h 10 min |
| February | 55°F | 22°F | 38.1°F | 1.61 | 3.9 | 6 | <1 | 26 | 11 h |
| March | 61°F | 27°F | 43.8°F | 1.33 | 1.3 | 5 | <1 | 25 | 12 h |
| April | 68°F | 31°F | 49.4°F | 0.48 | 1.8 | 3 | <1 | 16 | 13 h |
| May | 77°F | 39°F | 57.8°F | 0.52 | 0.0 | 3 | 1 | 4 | 13 h 50 min |
| June | 88°F | 49°F | 68.2°F | 0.49 | 0.0 | 3 | 11 | <1 | 14 h 20 min |
| July | 89°F | 55°F | 72.0°F | 3.26 | 0.0 | 12 | 12 | <1 | 14 h 10 min |
| August | 86°F | 55°F | 70.4°F | 3.23 | 0.0 | 12 | 6 | <1 | 13 h 30 min |
| September | 81°F | 49°F | 64.8°F | 2.08 | 0.0 | 7 | 1 | <1 | 12 h 30 min |
| October | 72°F | 36°F | 54.3°F | 1.19 | 0.0 | 4 | <1 | 6 | 11 h 20 min |
| November | 61°F | 27°F | 43.9°F | 1.04 | 0.7 | 4 | <1 | 22 | 10 h 30 min |
| December | 52°F | 20°F | 36.1°F | 1.54 | 2.3 | 6 | <1 | 30 | 10 h |
| Year (annual) | 70°F | 36°F | 52.9°F | 18.67 | 13.7 | 72 | 31 | 159 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 11°C | −7°C | 2.2°C | 48 mm | 9 cm |
| February | 13°C | −6°C | 3.4°C | 41 mm | 10 cm |
| March | 16°C | −3°C | 6.6°C | 34 mm | 3 cm |
| April | 20°C | −1°C | 9.7°C | 12 mm | 5 cm |
| May | 25°C | 4°C | 14.3°C | 13 mm | 0 cm |
| June | 31°C | 9°C | 20.1°C | 12 mm | 0 cm |
| July | 31°C | 13°C | 22.2°C | 83 mm | 0 cm |
| August | 30°C | 13°C | 21.3°C | 82 mm | 0 cm |
| September | 27°C | 9°C | 18.2°C | 53 mm | 0 cm |
| October | 22°C | 2°C | 12.4°C | 30 mm | 0 cm |
| November | 16°C | −3°C | 6.6°C | 26 mm | 2 cm |
| December | 11°C | −7°C | 2.3°C | 39 mm | 6 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00020808; 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 Black River Pumps?
Normal highs sit between 65°F and 85°F in April, May, September and October. Of those, April has the fewest days with rain (3).
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 USC00020808.
When is the last frost at Black River Pumps?
In Black River Pumps, the last spring frost (32°F) comes after May 16 in half of years and after June 2 in one year in ten; the first autumn frost comes before October 13 in half of years and before September 30 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- May 161 year in 10 after June 2; 9 in 10 after May 2
- First autumn frost, half of years before
- October 131 year in 10 before September 30; 9 in 10 before October 27
NOAA puts the median frost-free season at 149 days, and the season without a hard freeze (28°F) at 171 days.
A hard freeze (28°F) comes after May 4 in half of springs and before October 23 in half of autumns.
Frost dates for every NOAA station in Arizona · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00020808. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get at Black River Pumps?
In a normal year in Black River Pumps, 31 days a year reach 90°F (1 of them 100°F or more), 159 nights fall to 32°F or colder and 72 days bring measurable precipitation.
- Days at 90°F or more
- 31a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 159a normal year
- Days that stay below freezing
- 2high of 32°F or less
- Days with 0.01 inch of precipitation
- 72a normal year
- Days with 1 inch of snow or more
- 4a normal year
The highest temperature in this station's record (since 1951) is 105°F, on June 6, 2017; the lowest is −20°F, on January 4, 1971.
The wettest calendar year on that record is 1984, with 25.65 in; the snowiest season is 1964–65, with 44.8 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00020808; records: ACIS (NOAA Regional Climate Centers), station USC00020808. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Black River Pumps?
Over a year 85% of the sunlight that would reach the ground under clear skies gets through the clouds at Black River Pumps, 5.6 kWh per square metre a day. June is the sunniest month (91%) and July the cloudiest (78%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 83% | 3.4 |
| February | 82% | 4.3 |
| March | 86% | 5.8 |
| April | 89% | 7.2 |
| May | 91% | 8.0 |
| June | 91% | 8.1 |
| July | 78% | 6.5 |
| August | 80% | 6.2 |
| September | 85% | 5.7 |
| October | 89% | 4.9 |
| November | 87% | 3.8 |
| December | 82% | 3.1 |
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 Black River Pumps record?
A normal year at Black River Pumps brings 4,976 heating degree days, 7% fewer than the median U.S. place (5,373), and 587 cooling degree days, 35% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,842 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 901 | 0 |
| February | 753 | 0 |
| March | 657 | 0 |
| April | 468 | 0 |
| May | 237 | 12 |
| June | 29 | 125 |
| July | 1 | 217 |
| August | 4 | 170 |
| September | 63 | 59 |
| October | 334 | 4 |
| November | 632 | 0 |
| December | 896 | 0 |
| Year (annual) | 4,976 | 587 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00020808. 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 Black River Pumps been warmer than normal?
Over 37 complete years from 1952 to 2023, the station's annual mean temperature rose at a fitted 3.1°F per century (+0.17°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Black River Pumps's climate compare?
Black River Pumps is warmer than 14 of the 97 places with their own NOAA record in Arizona, and wetter than 77. Across the 7,247 U.S. stations with normals, its annual mean of 52.9°F is warmer than 53%.
In the Köppen classification computed from these normals, Black River Pumps is Csa: temperate, dry-summer, hot 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 Black River Pumps's climate
What is the coldest month at Black River Pumps?
January, with a normal high of 52°F and a normal low of 20°F. The warmest is July (89°F by day, 55°F at night).
Does it snow at Black River Pumps?
Yes: 14 inches in a normal year, falling on 5 days with 0.1 inch or more, the most in February (3.9 inches).
What is the rainiest month at Black River Pumps?
July, with 3.26 in of precipitation in a normal year; the driest is April with 0.48 in.
How late can frost come at Black River Pumps?
In half of years the last 32°F night comes after May 16; in one year in ten it comes after June 2. Waiting until June 2 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Arizona climateThe statewide normals and every place in the state
- Fort Thomas, AZ35 miles from this station, 64.5°F a year
- Sunrise Mountain, AZ36 miles from this station, 41.8°F a year
- Clifton, AZ39 miles from this station, 67.3°F a year
- Greer, AZ41 miles from this station, 44.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made