Muscle Shoals Water Treatment Plant, Alabama climate: Climate normals at a NOAA weather station
Muscle Shoals Water Treatment Plant's normal year runs from 29°F January nights to 90°F July afternoons, with 58.0 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 15.9°C, January lows of −1°C, July highs of 32°C, 1,474 mm of precipitation a year.
- NOAA stationMuscle Shoals Water Treatment Plant
- Station IDUSC00015751
- Location34.76°N 87.64°W
- Elevation540 ft (165 m)
On October 22, the normal high in Muscle Shoals Water Treatment Plant is 72°F and the normal low 47°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Muscle Shoals Water Treatment Plant.
- Jan 51° 29°
- Feb 55° 32°
- Mar 64° 40°
- Apr 73° 48°
- May 80° 57°
- Jun 87° 66°
- Jul 90° 69°
- Aug 90° 68°
- Sep 85° 62°
- Oct 75° 49°
- Nov 63° 38°
- Dec 54° 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 Muscle Shoals Water Treatment Plant each month?
July is the warmest month, with normal highs of 90°F; January the coldest, with normal lows of 29°F. The most precipitation falls in December (6.18 in), the least in October (3.85 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 51°F | 29°F | 40.1°F | 5.25 | – | <1 | 19 | 10 h |
| February | 55°F | 32°F | 43.6°F | 5.27 | – | <1 | 14 | 10 h 50 min |
| March | 64°F | 40°F | 51.7°F | 5.36 | – | <1 | 7 | 11 h 50 min |
| April | 73°F | 48°F | 60.4°F | 5.42 | – | <1 | <1 | 13 h |
| May | 80°F | 57°F | 68.7°F | 4.73 | – | 2 | <1 | 14 h |
| June | 87°F | 66°F | 76.6°F | 5.17 | – | 11 | <1 | 14 h 30 min |
| July | 90°F | 69°F | 79.7°F | 4.76 | – | 19 | <1 | 14 h 20 min |
| August | 90°F | 68°F | 79.1°F | 3.91 | – | 14 | <1 | 13 h 30 min |
| September | 85°F | 62°F | 73.2°F | 4.04 | – | 11 | <1 | 12 h 30 min |
| October | 75°F | 49°F | 61.9°F | 3.85 | – | 1 | <1 | 11 h 20 min |
| November | 63°F | 38°F | 50.3°F | 4.09 | – | <1 | 12 | 10 h 20 min |
| December | 54°F | 32°F | 43.0°F | 6.18 | – | <1 | 14 | 9 h 50 min |
| Year (annual) | 72°F | 49°F | 60.7°F | 58.03 | – | 58 | 67 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 10°C | −1°C | 4.5°C | 133 mm |
| February | 13°C | 0°C | 6.4°C | 134 mm |
| March | 18°C | 4°C | 10.9°C | 136 mm |
| April | 23°C | 9°C | 15.8°C | 138 mm |
| May | 27°C | 14°C | 20.4°C | 120 mm |
| June | 31°C | 19°C | 24.8°C | 131 mm |
| July | 32°C | 21°C | 26.5°C | 121 mm |
| August | 32°C | 20°C | 26.2°C | 99 mm |
| September | 29°C | 17°C | 22.9°C | 103 mm |
| October | 24°C | 10°C | 16.6°C | 98 mm |
| November | 17°C | 3°C | 10.2°C | 104 mm |
| December | 12°C | 0°C | 6.1°C | 157 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Russellville #2 (18 miles away), gets 1 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00015751; 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 Muscle Shoals Water Treatment Plant?
Normal highs sit between 65°F and 85°F in April, May, September and October.
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 USC00015751.
When is the last frost at Muscle Shoals Water Treatment Plant?
In Muscle Shoals Water Treatment Plant, the last spring frost (32°F) comes after March 30 in half of years and after April 13 in one year in ten; the first autumn frost comes before November 3 in half of years and before October 22 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
- March 301 year in 10 after April 13; 9 in 10 after March 11
- First autumn frost, half of years before
- November 31 year in 10 before October 22; 9 in 10 before November 19
NOAA puts the median frost-free season at 220 days, and the season without a hard freeze (28°F) at 242 days.
A hard freeze (28°F) comes after March 17 in half of springs and before November 14 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Muscle Shoals Water Treatment Plant in zone 8a in ZIP code 35660, the nearest ZIP area.
Frost dates for every NOAA station in Alabama · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00015751; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. 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 Muscle Shoals Water Treatment Plant?
In a normal year in Muscle Shoals Water Treatment Plant, 58 days a year reach 90°F (1 of them 100°F or more) and 67 nights fall to 32°F or colder.
- Days at 90°F or more
- 58a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 67a normal year
- Days that stay below freezing
- 3high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00015751.
How sunny is it at Muscle Shoals Water Treatment Plant?
Over a year 76% of the sunlight that would reach the ground under clear skies gets through the clouds at Muscle Shoals Water Treatment Plant, 4.4 kWh per square metre a day. August is the sunniest month (81%) and February the cloudiest (65%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 69% | 2.5 |
| February | 65% | 3.0 |
| March | 70% | 4.2 |
| April | 76% | 5.5 |
| May | 77% | 6.0 |
| June | 80% | 6.4 |
| July | 81% | 6.1 |
| August | 81% | 5.6 |
| September | 80% | 4.9 |
| October | 78% | 3.9 |
| November | 76% | 2.9 |
| December | 67% | 2.2 |
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 Muscle Shoals Water Treatment Plant record?
A normal year at Muscle Shoals Water Treatment Plant brings 3,311 heating degree days, 38% fewer than the median U.S. place (5,373), and 1,769 cooling degree days, 95% 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 4,967 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 772 | 0 |
| February | 600 | 1 |
| March | 419 | 7 |
| April | 179 | 41 |
| May | 44 | 159 |
| June | 0 | 347 |
| July | 0 | 456 |
| August | 0 | 437 |
| September | 12 | 258 |
| October | 158 | 60 |
| November | 445 | 4 |
| December | 682 | 0 |
| Year (annual) | 3,311 | 1,769 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00015751. 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 Muscle Shoals Water Treatment Plant been warmer than normal?
2025 averaged 61.9°F, 1.1°F above the 1991-2020 normal of 60.7°F. 4 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 61.3°F | +0.6°F | 63.22 |
| 2022 | 61.2°F | +0.5°F | 56.90 |
| 2023 | 62.8°F | +2.1°F | 47.34 |
| 2025 | 61.9°F | +1.1°F | 59.12 |
Source: observed years: ACIS, station USC00015751. A year counts only with all twelve months complete.
How does Muscle Shoals Water Treatment Plant's climate compare?
Muscle Shoals Water Treatment Plant is warmer than 11 of the 80 places with their own NOAA record in Alabama, and wetter than 45. Across the 7,247 U.S. stations with normals, its annual mean of 60.7°F is warmer than 76%.
In the Köppen classification computed from these normals, Muscle Shoals Water Treatment Plant 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 Muscle Shoals Water Treatment Plant 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.
- Florence, AL42,716 people · 5 mi N
- Sheffield, AL9,335 people · 3 mi W
- Tuscumbia, AL9,222 people · 4 mi SW
- Underwood-Petersville, AL3,049 people · 9 mi N
- St. Florian, AL717 people · 8 mi N
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 Muscle Shoals Water Treatment Plant's climate
What is the coldest month at Muscle Shoals Water Treatment Plant?
January, with a normal high of 51°F and a normal low of 29°F. The warmest is July (90°F by day, 69°F at night).
Does it snow at Muscle Shoals Water Treatment Plant?
Rarely. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Russellville #2 (18 miles away), records 1 inches of snow in a normal year.
What is the rainiest month at Muscle Shoals Water Treatment Plant?
December, with 6.18 in of precipitation in a normal year; the driest is October with 3.85 in.
What plant hardiness zone is Muscle Shoals Water Treatment Plant in?
The USDA's 2023 map puts Muscle Shoals Water Treatment Plant in zone 8a in ZIP code 35660, the nearest ZIP area.
How late can frost come at Muscle Shoals Water Treatment Plant?
In half of years the last 32°F night comes after March 30; in one year in ten it comes after April 13. Waiting until April 13 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Alabama climateThe statewide normals and every place in the state
- Muscle Shoals, AL2 miles from this station, 62.9°F a year
- Courtland, AL18 miles from this station, 60.7°F a year
- Lexington, AL21 miles from this station, 61.0°F a year
- Russellville, AL22 miles from this station, 59.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made