Allatoona Dam 2, Georgia climate: Climate normals at a NOAA weather station
Allatoona Dam 2's normal year runs from 29°F January nights to 88°F July afternoons, with 51.8 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 15.3°C, January lows of −2°C, July highs of 31°C, 1,315 mm of precipitation a year.
- NOAA stationAllatoona Dam 2
- Station IDUSC00090181
- Location34.16°N 84.73°W
- Elevation975 ft (297 m)
On October 23, the normal high in Allatoona Dam 2 is 70°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 Allatoona Dam 2.
- Jan 51° 29°
- Feb 55° 32°
- Mar 63° 39°
- Apr 72° 46°
- May 79° 56°
- Jun 85° 64°
- Jul 88° 67°
- Aug 87° 67°
- Sep 82° 61°
- Oct 73° 49°
- Nov 62° 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 Allatoona Dam 2 each month?
July is the warmest month, with normal highs of 88°F; January the coldest, with normal lows of 29°F. The most precipitation falls in March (4.97 in), the least in October (3.42 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 51°F | 29°F | 39.9°F | 4.92 | 11 | <1 | 20 | 10 h 10 min |
| February | 55°F | 32°F | 43.4°F | 4.43 | 11 | <1 | 15 | 11 h |
| March | 63°F | 39°F | 51.0°F | 4.97 | 11 | <1 | 7 | 11 h 50 min |
| April | 72°F | 46°F | 59.3°F | 4.53 | 9 | <1 | 1 | 13 h |
| May | 79°F | 56°F | 67.4°F | 3.90 | 9 | 2 | <1 | 13 h 50 min |
| June | 85°F | 64°F | 74.4°F | 4.01 | 11 | 8 | <1 | 14 h 30 min |
| July | 88°F | 67°F | 77.7°F | 4.90 | 11 | 15 | <1 | 14 h 10 min |
| August | 87°F | 67°F | 77.2°F | 4.13 | 9 | 13 | <1 | 13 h 30 min |
| September | 82°F | 61°F | 71.6°F | 3.94 | 8 | 5 | <1 | 12 h 30 min |
| October | 73°F | 49°F | 60.9°F | 3.42 | 8 | <1 | 1 | 11 h 20 min |
| November | 62°F | 38°F | 49.8°F | 3.94 | 9 | <1 | 9 | 10 h 20 min |
| December | 54°F | 32°F | 43.0°F | 4.69 | 10 | <1 | 16 | 9 h 50 min |
| Year (annual) | 71°F | 48°F | 59.6°F | 51.78 | 118 | 44 | 68 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 11°C | −2°C | 4.4°C | 125 mm |
| February | 13°C | 0°C | 6.3°C | 113 mm |
| March | 17°C | 4°C | 10.6°C | 126 mm |
| April | 22°C | 8°C | 15.2°C | 115 mm |
| May | 26°C | 13°C | 19.7°C | 99 mm |
| June | 29°C | 18°C | 23.6°C | 102 mm |
| July | 31°C | 20°C | 25.4°C | 124 mm |
| August | 31°C | 19°C | 25.1°C | 105 mm |
| September | 28°C | 16°C | 22.0°C | 100 mm |
| October | 23°C | 10°C | 16.1°C | 87 mm |
| November | 16°C | 3°C | 9.9°C | 100 mm |
| December | 12°C | 0°C | 6.1°C | 119 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00090181; 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 Allatoona Dam 2?
Normal highs sit between 65°F and 85°F in April, May, June, September and October. Of those, October has the fewest days with rain (8).
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 USC00090181.
When is the last frost at Allatoona Dam 2?
In Allatoona Dam 2, the last spring frost (32°F) comes after April 2 in half of years and after April 19 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 21 year in 10 after April 19; 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 215 days, and the season without a hard freeze (28°F) at 239 days.
A hard freeze (28°F) comes after March 20 in half of springs and before November 14 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Allatoona Dam 2 in zone 8a in ZIP code 30137, the nearest ZIP area.
Frost dates for every NOAA station in Georgia · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00090181; 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 Allatoona Dam 2?
In a normal year in Allatoona Dam 2, 44 days a year reach 90°F (1 of them 100°F or more), 68 nights fall to 32°F or colder and 118 days bring measurable precipitation.
- Days at 90°F or more
- 44a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 68a normal year
- Days that stay below freezing
- 2high of 32°F or less
- Days with 0.01 inch of precipitation
- 118a normal year
The highest temperature in this station's record (since 1946) is 106°F, on July 2, 2012; the lowest is −6°F, on January 25, 1963.
The wettest calendar year on that record is 1964, with 64.58 in; the snowiest season is 1950–51, with 1.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00090181; records: ACIS (NOAA Regional Climate Centers), station USC00090181. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Allatoona Dam 2?
Over a year 76% of the sunlight that would reach the ground under clear skies gets through the clouds at Allatoona Dam 2, 4.4 kWh per square metre a day. August is the sunniest month (80%) and February the cloudiest (66%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 70% | 2.6 |
| February | 66% | 3.1 |
| March | 70% | 4.2 |
| April | 76% | 5.5 |
| May | 77% | 6.0 |
| June | 79% | 6.3 |
| July | 78% | 6.0 |
| August | 80% | 5.6 |
| September | 79% | 4.8 |
| October | 78% | 3.9 |
| November | 76% | 3.0 |
| 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 Allatoona Dam 2 record?
A normal year at Allatoona Dam 2 brings 3,408 heating degree days, 37% fewer than the median U.S. place (5,373), and 1,479 cooling degree days, 63% 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 4,588 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 777 | 0 |
| February | 604 | 0 |
| March | 439 | 5 |
| April | 202 | 31 |
| May | 54 | 129 |
| June | 4 | 286 |
| July | 0 | 392 |
| August | 0 | 378 |
| September | 16 | 214 |
| October | 171 | 42 |
| November | 459 | 2 |
| December | 683 | 1 |
| Year (annual) | 3,408 | 1,479 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00090181. 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.
How does Allatoona Dam 2's climate compare?
Allatoona Dam 2 is warmer than 10 of the 101 places with their own NOAA record in Georgia, and wetter than 52. 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, Allatoona Dam 2 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 Allatoona Dam 2 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.
- Woodstock, GA39,381 people · 13 mi E
- Canton, GA38,049 people · 15 mi E
- Holly Springs, GA20,133 people · 14 mi E
- Emerson, GA2,192 people · 2 mi S
- White, GA633 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 Allatoona Dam 2's climate
What is the coldest month at Allatoona Dam 2?
January, with a normal high of 51°F and a normal low of 29°F. The warmest is July (88°F by day, 67°F at night).
Does it snow at Allatoona Dam 2?
Rarely: NOAA's normal is no measurable snow a year.
What is the rainiest month at Allatoona Dam 2?
March, with 4.97 in of precipitation in a normal year; the driest is October with 3.42 in.
What plant hardiness zone is Allatoona Dam 2 in?
The USDA's 2023 map puts Allatoona Dam 2 in zone 8a in ZIP code 30137, the nearest ZIP area.
How late can frost come at Allatoona Dam 2?
In half of years the last 32°F night comes after April 2; in one year in ten it comes after April 19. Waiting until April 19 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Georgia climateThe statewide normals and every place in the state
- Cartersville, GA7 miles from this station, 60.8°F a year
- Dallas, GA12 miles from this station, 61.2°F a year
- Mableton, GA23 miles from this station, 60.1°F a year
- Jasper, GA27 miles from this station, 58.3°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made