Fort Oglethorpe, Georgia climate: Normal weather by month, frost dates and records
Fort Oglethorpe's normal year runs from 29°F January nights to 89°F July afternoons, with 56.5 inches of precipitation and less than an inch of snow (0.7 in) a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 15.2°C, January lows of −2°C, July highs of 32°C, 1,434 mm of precipitation a year.
- NOAA stationChickamauga Park Larc
- Station IDUSC00091908
- Location34.92°N 85.27°W
- Elevation782 ft (238 m)
- From the center2 miles
- Population10,614
On October 14, the normal high in Fort Oglethorpe is 76°F and the normal low 48°F, and the chance of measurable rain or snow is 23%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Fort Oglethorpe.
- Jan 51° 29°
- Feb 56° 32°
- Mar 64° 37°
- Apr 73° 45°
- May 80° 54°
- Jun 86° 63°
- Jul 89° 66°
- Aug 89° 66°
- Sep 84° 59°
- Oct 75° 47°
- Nov 62° 35°
- Dec 53° 31°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Fort Oglethorpe each month?
July is the warmest month, with normal highs of 89°F; January the coldest, with normal lows of 29°F. The most precipitation falls in January (5.61 in), the least in October (3.65 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 51°F | 29°F | 39.9°F | 5.61 | 10 | <1 | 22 | 10 h |
| February | 56°F | 32°F | 43.6°F | 5.12 | 10 | <1 | 16 | 10 h 50 min |
| March | 64°F | 37°F | 50.5°F | 5.03 | 10 | <1 | 11 | 11 h 50 min |
| April | 73°F | 45°F | 59.2°F | 4.73 | 9 | <1 | 2 | 13 h |
| May | 80°F | 54°F | 66.8°F | 4.64 | 10 | 2 | <1 | 14 h |
| June | 86°F | 63°F | 74.4°F | 4.19 | 9 | 11 | <1 | 14 h 30 min |
| July | 89°F | 66°F | 77.8°F | 5.06 | 11 | 15 | <1 | 14 h 20 min |
| August | 89°F | 66°F | 77.2°F | 4.47 | 9 | 16 | <1 | 13 h 30 min |
| September | 84°F | 59°F | 71.5°F | 4.22 | 7 | 7 | <1 | 12 h 30 min |
| October | 75°F | 47°F | 60.8°F | 3.65 | 7 | <1 | 2 | 11 h 20 min |
| November | 62°F | 35°F | 48.6°F | 4.38 | 8 | <1 | 13 | 10 h 20 min |
| December | 53°F | 31°F | 42.3°F | 5.36 | 10 | <1 | 18 | 9 h 50 min |
| Year (annual) | 72°F | 47°F | 59.4°F | 56.46 | 110 | 51 | 84 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 11°C | −2°C | 4.4°C | 142 mm |
| February | 13°C | 0°C | 6.4°C | 130 mm |
| March | 18°C | 3°C | 10.3°C | 128 mm |
| April | 23°C | 7°C | 15.1°C | 120 mm |
| May | 26°C | 12°C | 19.3°C | 118 mm |
| June | 30°C | 17°C | 23.6°C | 106 mm |
| July | 32°C | 19°C | 25.4°C | 129 mm |
| August | 32°C | 19°C | 25.1°C | 114 mm |
| September | 29°C | 15°C | 21.9°C | 107 mm |
| October | 24°C | 8°C | 16.0°C | 93 mm |
| November | 17°C | 2°C | 9.2°C | 111 mm |
| December | 12°C | 0°C | 5.7°C | 136 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00091908; 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.
When is the best weather to visit Fort Oglethorpe?
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 USC00091908.
When is the last frost in Fort Oglethorpe?
In Fort Oglethorpe, the last spring frost (32°F) comes after April 6 in half of years and after April 23 in one year in ten; the first autumn frost comes before October 30 in half of years and before October 17 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 61 year in 10 after April 23; 9 in 10 after March 20
- First autumn frost, half of years before
- October 301 year in 10 before October 17; 9 in 10 before November 11
NOAA puts the median frost-free season at 205 days, and the season without a hard freeze (28°F) at 225 days.
A hard freeze (28°F) comes after March 27 in half of springs and before November 6 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Fort Oglethorpe in zone 8a in ZIP code 30742.
Frost dates for every NOAA station in Georgia · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00091908; 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 in Fort Oglethorpe?
In a normal year in Fort Oglethorpe, 51 days a year reach 90°F (2 of them 100°F or more), 84 nights fall to 32°F or colder and 110 days bring measurable precipitation.
- Days at 90°F or more
- 51a normal year
- Days at 100°F or more
- 2a normal year
- Nights at 32°F or colder
- 84a normal year
- Days that stay below freezing
- 2high of 32°F or less
- Days with 0.01 inch of precipitation
- 110a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00091908.
How sunny is Fort Oglethorpe?
Over a year 76% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Fort Oglethorpe, 4.4 kWh per square metre a day. August is the sunniest month (80%) and February the cloudiest (65%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 70% | 2.5 |
| February | 65% | 3.0 |
| March | 69% | 4.2 |
| April | 76% | 5.5 |
| May | 77% | 6.0 |
| June | 79% | 6.3 |
| July | 79% | 6.0 |
| August | 80% | 5.6 |
| September | 79% | 4.8 |
| 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 much heating and cooling does Fort Oglethorpe need?
A normal year in Fort Oglethorpe brings 3,481 heating degree days, 35% fewer than the median U.S. place (5,373), and 1,461 cooling degree days, 61% 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 4,558 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 778 | 0 |
| February | 604 | 4 |
| March | 452 | 4 |
| April | 203 | 29 |
| May | 59 | 115 |
| June | 2 | 282 |
| July | 0 | 395 |
| August | 0 | 377 |
| September | 13 | 210 |
| October | 173 | 43 |
| November | 493 | 1 |
| December | 704 | 0 |
| Year (annual) | 3,481 | 1,461 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00091908. 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 Fort Oglethorpe's climate compare?
Fort Oglethorpe is warmer than 8 of the other 100 places with their own NOAA record in Georgia, and wetter than 71. Across the 7,247 U.S. stations with normals, its annual mean of 59.4°F is warmer than 73%.
In the Köppen classification computed from these normals, Fort Oglethorpe 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 Fort Oglethorpe share this climate record?
11 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.
- East Ridge, TN21,970 people · 6 mi NE
- Red Bank, TN12,073 people · 13 mi N
- Collegedale, TN11,510 people · 16 mi NE
- Signal Mountain, TN8,877 people · 16 mi N
- Harrison, TN8,446 people · 16 mi NE
- Apison, TN4,397 people · 16 mi E
- Walden, TN1,974 people · 17 mi N
- McDonald, TN541 people · 21 mi NE
- Ooltewah, TN489 people · 16 mi NE
- Ridgeside, TN444 people · 8 mi N
- Whiteside, TN50 people · 13 mi NW
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 Fort Oglethorpe's climate
What is the coldest month in Fort Oglethorpe?
January, with a normal high of 51°F and a normal low of 29°F. The warmest is July (89°F by day, 66°F at night).
Does it snow in Fort Oglethorpe?
Rarely: NOAA's normal is 0.7 inch a year.
What is the rainiest month in Fort Oglethorpe?
January, with 5.61 in of precipitation in a normal year; the driest is October with 3.65 in.
What plant hardiness zone is Fort Oglethorpe in?
The USDA's 2023 map puts Fort Oglethorpe in zone 8a in ZIP code 30742.
How late can frost come in Fort Oglethorpe?
In half of years the last 32°F night comes after April 6; in one year in ten it comes after April 23. Waiting until April 23 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Georgia climateThe statewide normals and every place in the state
- Chickamauga, GA5 miles from this station, 61.2°F a year
- Lookout Mountain, TN7 miles from this station, 57.4°F a year
- Chattanooga, TN9 miles from this station, 61.9°F a year
- Dalton, GA24 miles from this station, 60.9°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made