Blakely Mountain Dam, Arkansas climate: Climate normals at a NOAA weather station
Blakely Mountain Dam's normal year runs from 29°F January nights to 91°F July afternoons, with 57.9 inches of precipitation and 1 inch of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 15.3°C, January lows of −2°C, July highs of 33°C, 1,470 mm of precipitation a year.
- NOAA stationBlakely Mountain Dam
- Station IDUSC00030764
- Location34.57°N 93.19°W
- Elevation426 ft (130 m)
On October 23, the normal high in Blakely Mountain Dam is 71°F and the normal low 46°F, and the chance of measurable rain or snow is 26%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Blakely Mountain Dam.
- Jan 50° 29°
- Feb 54° 32°
- Mar 63° 38°
- Apr 72° 46°
- May 79° 56°
- Jun 87° 63°
- Jul 91° 67°
- Aug 91° 66°
- Sep 84° 60°
- Oct 73° 48°
- Nov 61° 38°
- Dec 52° 32°
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 Blakely Mountain Dam each month?
July is the warmest month, with normal highs of 91°F; January the coldest, with normal lows of 29°F. The most precipitation falls in May (6.54 in), the least in August (3.27 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 50°F | 29°F | 39.7°F | 3.93 | 0.4 | 9 | <1 | 22 | 10 h |
| February | 54°F | 32°F | 43.0°F | 4.61 | 0.2 | 9 | <1 | 18 | 11 h |
| March | 63°F | 38°F | 50.6°F | 5.26 | 0.2 | 11 | <1 | 8 | 11 h 50 min |
| April | 72°F | 46°F | 58.9°F | 5.76 | 0.0 | 9 | <1 | 2 | 13 h |
| May | 79°F | 56°F | 67.1°F | 6.54 | 0.0 | 10 | 1 | <1 | 14 h |
| June | 87°F | 63°F | 74.8°F | 4.51 | 0.0 | 8 | 10 | <1 | 14 h 30 min |
| July | 91°F | 67°F | 78.5°F | 4.40 | 0.0 | 8 | 20 | <1 | 14 h 20 min |
| August | 91°F | 66°F | 78.3°F | 3.27 | 0.0 | 7 | 20 | <1 | 13 h 30 min |
| September | 84°F | 60°F | 71.7°F | 4.10 | 0.0 | 7 | 7 | <1 | 12 h 30 min |
| October | 73°F | 48°F | 60.8°F | 4.69 | 0.0 | 8 | <1 | 1 | 11 h 20 min |
| November | 61°F | 38°F | 49.8°F | 5.45 | 0.0 | 9 | <1 | 10 | 10 h 20 min |
| December | 52°F | 32°F | 42.0°F | 5.34 | 0.6 | 10 | <1 | 19 | 9 h 50 min |
| Year (annual) | 71°F | 48°F | 59.6°F | 57.86 | 1.4 | 104 | 58 | 80 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 10°C | −2°C | 4.3°C | 100 mm | 1 cm |
| February | 12°C | 0°C | 6.1°C | 117 mm | 1 cm |
| March | 17°C | 4°C | 10.3°C | 134 mm | 1 cm |
| April | 22°C | 8°C | 14.9°C | 146 mm | 0 cm |
| May | 26°C | 13°C | 19.5°C | 166 mm | 0 cm |
| June | 30°C | 17°C | 23.8°C | 115 mm | 0 cm |
| July | 33°C | 19°C | 25.8°C | 112 mm | 0 cm |
| August | 33°C | 19°C | 25.7°C | 83 mm | 0 cm |
| September | 29°C | 15°C | 22.1°C | 104 mm | 0 cm |
| October | 23°C | 9°C | 16.0°C | 119 mm | 0 cm |
| November | 16°C | 4°C | 9.9°C | 138 mm | 0 cm |
| December | 11°C | 0°C | 5.6°C | 136 mm | 2 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00030764; 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 Blakely Mountain Dam?
Normal highs sit between 65°F and 85°F in April, May, September and October. Of those, September has the fewest days with rain (7).
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 USC00030764.
When is the last frost at Blakely Mountain Dam?
In Blakely Mountain Dam, the last spring frost (32°F) comes after April 3 in half of years and after April 20 in one year in ten; the first autumn frost comes before November 4 in half of years and before October 21 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
- April 31 year in 10 after April 20; 9 in 10 after March 14
- First autumn frost, half of years before
- November 41 year in 10 before October 21; 9 in 10 before November 21
NOAA puts the median frost-free season at 216 days, and the season without a hard freeze (28°F) at 243 days.
A hard freeze (28°F) comes after March 18 in half of springs and before November 16 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Blakely Mountain Dam in zone 8a in ZIP code 71956, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 8a: the coldest night of a typical year reaches 13°F (21 complete years).
Frost dates for every NOAA station in Arkansas · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00030764; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. 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 Blakely Mountain Dam?
In a normal year in Blakely Mountain Dam, 58 days a year reach 90°F (5 of them 100°F or more), 80 nights fall to 32°F or colder and 104 days bring measurable precipitation.
- Days at 90°F or more
- 58a normal year
- Days at 100°F or more
- 5a normal year
- Nights at 32°F or colder
- 80a normal year
- Days that stay below freezing
- 4high of 32°F or less
- Days with 0.01 inch of precipitation
- 104a normal year
- Days with 1 inch of snow or more
- fewer than 1a normal year
The highest temperature in this station's record (since 1956) is 111°F, on August 1, 1986; the lowest is −8°F, on January 12, 1962.
The wettest calendar year on that record is 1973, with 86.05 in; the snowiest season is 1977–78, with 15.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00030764; records: ACIS (NOAA Regional Climate Centers), station USC00030764. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Blakely Mountain Dam?
Over a year 75% of the sunlight that would reach the ground under clear skies gets through the clouds at Blakely Mountain Dam, 4.4 kWh per square metre a day. August is the sunniest month (81%) and February the cloudiest (64%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 70% | 2.5 |
| February | 64% | 3.0 |
| March | 69% | 4.1 |
| April | 72% | 5.2 |
| May | 73% | 5.7 |
| June | 80% | 6.4 |
| July | 81% | 6.3 |
| August | 81% | 5.7 |
| September | 80% | 4.9 |
| October | 76% | 3.8 |
| November | 72% | 2.8 |
| December | 69% | 2.3 |
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 Blakely Mountain Dam record?
A normal year at Blakely Mountain Dam brings 3,477 heating degree days, 35% fewer than the median U.S. place (5,373), and 1,545 cooling degree days, 70% more than the median (908). Five months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 4,621 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 784 | 0 |
| February | 615 | 0 |
| March | 448 | 3 |
| April | 206 | 23 |
| May | 54 | 118 |
| June | 2 | 297 |
| July | 0 | 419 |
| August | 0 | 412 |
| September | 18 | 221 |
| October | 177 | 47 |
| November | 459 | 4 |
| December | 713 | 0 |
| Year (annual) | 3,477 | 1,545 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00030764. 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 Blakely Mountain Dam been warmer than normal?
2025 averaged 62.5°F, 2.9°F above the 1991-2020 normal of 59.6°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 59.9°F | +0.3°F | 58.19 | 13.0 |
| 2022 | 60.0°F | +0.4°F | 56.43 | 3.0 |
| 2023 | 61.5°F | +1.9°F | 65.28 | 0.0 |
| 2024 | 62.5°F | +2.9°F | 58.43 | 1.5 |
| 2025 | 62.5°F | +2.9°F | 57.82 | 9.1 |
Over 51 complete years from 1957 to 2025, the station's annual mean temperature rose at a fitted 2.6°F per century (+0.15°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00030764; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Blakely Mountain Dam's climate compare?
Blakely Mountain Dam is warmer than 22 of the 86 places with their own NOAA record in Arkansas, and wetter than 81. Across the 7,247 U.S. stations with normals, its annual mean of 59.6°F is warmer than 74%.
In the Köppen classification computed from these normals, Blakely Mountain Dam is Cfa: temperate, no dry season, 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.
Which places near Blakely Mountain Dam share this climate record?
5 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Piney, AR4,485 people · 5 mi SE
- Rockwell, AR3,921 people · 8 mi SE
- Mountain Pine, AR587 people · 1 mi E
- Pearcy, AR343 people · 11 mi SW
- Crystal Springs, AR302 people · 9 mi W
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Blakely Mountain Dam's climate
What is the coldest month at Blakely Mountain Dam?
January, with a normal high of 50°F and a normal low of 29°F. The warmest is July (91°F by day, 67°F at night).
Does it snow at Blakely Mountain Dam?
Yes: 1 inch in a normal year, falling on 0 days with 0.1 inch or more, the most in December (0.6 inches).
What is the rainiest month at Blakely Mountain Dam?
May, with 6.54 in of precipitation in a normal year; the driest is August with 3.27 in.
What plant hardiness zone is Blakely Mountain Dam in?
The USDA's 2023 map puts Blakely Mountain Dam in zone 8a in ZIP code 71956, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches 13°F (21 years, 1991-2020): zone 8a.
How late can frost come at Blakely Mountain Dam?
In half of years the last 32°F night comes after April 3; in one year in ten it comes after April 20. Waiting until April 20 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Arkansas climateThe statewide normals and every place in the state
- Hot Springs, AR21 miles from this station, 63.1°F a year
- Mount Ida, AR22 miles from this station, 61.7°F a year
- Degray Lake State Park, AR22 miles from this station, 60.9°F a year
- Mount Ida (3 mi SE), AR22 miles from this station, 59.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made