Dekalb, Texas climate: Climate normals at a NOAA weather station
Dekalb's normal year runs from 32°F January nights to 93°F July afternoons, with 52.8 inches of precipitation and 3 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 17.3°C, January lows of 0°C, July highs of 34°C, 1,342 mm of precipitation a year.
- NOAA stationDekalb
- Station IDUSC00412352
- Location33.48°N 94.62°W
- Elevation341 ft (104 m)
On October 23, the normal high in Dekalb is 75°F and the normal low 48°F, and the chance of measurable rain or snow is 19%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Dekalb.
- Jan 56° 32°
- Feb 59° 35°
- Mar 67° 42°
- Apr 75° 50°
- May 82° 60°
- Jun 89° 67°
- Jul 93° 70°
- Aug 94° 69°
- Sep 88° 63°
- Oct 77° 51°
- Nov 66° 41°
- Dec 57° 34°
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 Dekalb each month?
July is the warmest month, with normal highs of 93°F; January the coldest, with normal lows of 32°F. The most precipitation falls in April (5.40 in), the least in August (3.03 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 56°F | 32°F | 43.6°F | 4.13 | 1.1 | 7 | <1 | 16 | 10 h 10 min |
| February | 59°F | 35°F | 46.8°F | 4.20 | 1.1 | 7 | <1 | 10 | 11 h |
| March | 67°F | 42°F | 54.6°F | 4.91 | 0.1 | 8 | <1 | 4 | 12 h |
| April | 75°F | 50°F | 62.5°F | 5.40 | 0.0 | 8 | <1 | <1 | 13 h |
| May | 82°F | 60°F | 71.0°F | 4.91 | 0.0 | 8 | 3 | <1 | 13 h 50 min |
| June | 89°F | 67°F | 77.8°F | 4.01 | 0.0 | 6 | 17 | <1 | 14 h 20 min |
| July | 93°F | 70°F | 81.7°F | 3.25 | 0.0 | 5 | 26 | <1 | 14 h 10 min |
| August | 94°F | 69°F | 81.4°F | 3.03 | 0.0 | 5 | 25 | <1 | 13 h 30 min |
| September | 88°F | 63°F | 75.2°F | 4.14 | 0.0 | 5 | 15 | <1 | 12 h 30 min |
| October | 77°F | 51°F | 64.1°F | 5.32 | 0.0 | 5 | 2 | 1 | 11 h 20 min |
| November | 66°F | 41°F | 53.3°F | 4.54 | 0.0 | 6 | <1 | 6 | 10 h 30 min |
| December | 57°F | 34°F | 45.5°F | 4.98 | 0.4 | 7 | <1 | 12 | 10 h |
| Year (annual) | 75°F | 51°F | 63.1°F | 52.82 | 2.7 | 76 | 88 | 49 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 13°C | 0°C | 6.4°C | 105 mm | 3 cm |
| February | 15°C | 1°C | 8.2°C | 107 mm | 3 cm |
| March | 20°C | 5°C | 12.6°C | 125 mm | 0 cm |
| April | 24°C | 10°C | 16.9°C | 137 mm | 0 cm |
| May | 28°C | 15°C | 21.7°C | 125 mm | 0 cm |
| June | 32°C | 19°C | 25.4°C | 102 mm | 0 cm |
| July | 34°C | 21°C | 27.6°C | 83 mm | 0 cm |
| August | 35°C | 20°C | 27.4°C | 77 mm | 0 cm |
| September | 31°C | 17°C | 24.0°C | 105 mm | 0 cm |
| October | 25°C | 10°C | 17.8°C | 135 mm | 0 cm |
| November | 19°C | 5°C | 11.8°C | 115 mm | 0 cm |
| December | 14°C | 1°C | 7.5°C | 126 mm | 1 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00412352; 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 Dekalb?
Normal highs sit between 65°F and 85°F in March, April, May, October and November. Of those, October has the fewest days with rain (5).
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 USC00412352.
When is the last frost at Dekalb?
In Dekalb, the last spring frost (32°F) comes after March 26 in half of years and after April 14 in one year in ten; the first autumn frost comes before November 6 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 261 year in 10 after April 14; 9 in 10 after March 6
- First autumn frost, half of years before
- November 61 year in 10 before October 22; 9 in 10 before November 24
NOAA puts the median frost-free season at 225 days, and the season without a hard freeze (28°F) at 250 days.
A hard freeze (28°F) comes after March 11 in half of springs and before November 16 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Dekalb in zone 8b in ZIP code 75559, the nearest ZIP area.
Frost dates for every NOAA station in Texas · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00412352; 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 Dekalb?
In a normal year in Dekalb, 88 days a year reach 90°F (13 of them 100°F or more), 49 nights fall to 32°F or colder and 76 days bring measurable precipitation.
- Days at 90°F or more
- 88a normal year
- Days at 100°F or more
- 13a normal year
- Nights at 32°F or colder
- 49a normal year
- Days that stay below freezing
- 2high of 32°F or less
- Days with 0.01 inch of precipitation
- 76a normal year
- Days with 1 inch of snow or more
- 1a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00412352.
How sunny is it at Dekalb?
Over a year 77% of the sunlight that would reach the ground under clear skies gets through the clouds at Dekalb, 4.5 kWh per square metre a day. August is the sunniest month (85%) and February the cloudiest (65%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 71% | 2.7 |
| February | 65% | 3.1 |
| March | 70% | 4.2 |
| April | 74% | 5.3 |
| May | 76% | 5.8 |
| June | 82% | 6.5 |
| July | 84% | 6.4 |
| August | 85% | 6.0 |
| September | 82% | 5.0 |
| October | 79% | 4.0 |
| November | 75% | 2.9 |
| December | 71% | 2.4 |
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 Dekalb record?
A normal year at Dekalb brings 2,767 heating degree days, 49% fewer than the median U.S. place (5,373), and 2,115 cooling degree days, 2.3 times 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 5,574 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 665 | 1 |
| February | 512 | 2 |
| March | 337 | 16 |
| April | 132 | 59 |
| May | 23 | 209 |
| June | 0 | 383 |
| July | 0 | 519 |
| August | 0 | 508 |
| September | 9 | 315 |
| October | 115 | 86 |
| November | 363 | 13 |
| December | 610 | 4 |
| Year (annual) | 2,767 | 2,115 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00412352. 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 Dekalb's climate compare?
Dekalb is warmer than 60 of the 321 places with their own NOAA record in Texas, and wetter than 293. Across the 7,247 U.S. stations with normals, its annual mean of 63.1°F is warmer than 83%.
In the Köppen classification computed from these normals, Dekalb 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 Dekalb share this climate record?
4 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.
- New Boston, TX4,546 people · 11 mi E
- De Kalb, TX1,426 people · 2 mi N
- Foreman, AR936 people · 21 mi NE
- Avery, TX447 people · 11 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 Dekalb's climate
What is the coldest month at Dekalb?
January, with a normal high of 56°F and a normal low of 32°F. The warmest is July (93°F by day, 70°F at night).
Does it snow at Dekalb?
Yes: 3 inches in a normal year, falling on 1 days with 0.1 inch or more, the most in January (1.1 inches).
What is the rainiest month at Dekalb?
April, with 5.40 in of precipitation in a normal year; the driest is August with 3.03 in.
What plant hardiness zone is Dekalb in?
The USDA's 2023 map puts Dekalb in zone 8b in ZIP code 75559, the nearest ZIP area.
How late can frost come at Dekalb?
In half of years the last 32°F night comes after March 26; in one year in ten it comes after April 14. Waiting until April 14 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Texas climateThe statewide normals and every place in the state
- Clarksville, TX28 miles from this station, 63.0°F a year
- Wright Patman Dam & Lake, TX29 miles from this station, 64.5°F a year
- Mount Pleasant, TX31 miles from this station, 63.6°F a year
- Texarkana, TX31 miles from this station, 64.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made