What is the hottest month in Dallas?

August is Dallas's hottest month, with the highest average daily high of the year. The month-by-month table above shows Dallas's exact average high and low for each month, based on the 1991–2020 climate normals — the standard 30-year reference period meteorologists use.

What is the coldest month in Dallas?

January is Dallas's coldest month, with the lowest average daily low of the year. The averages-by-month chart above gives the exact average high and low for every month, so you can see how cold a typical winter day runs.

How much does it rain in Dallas?

Dallas's total annual precipitation and its wettest and driest months are shown in the rainfall-by-month section above. Those figures are 1991–2020 normals — the average monthly precipitation total across that 30-year window — so they reflect a typical year rather than any single wet or dry season.

What months are best to visit Dallas?

The most comfortable months in Dallas are usually the shoulder seasons — spring and fall — when temperatures sit between the summer peak and winter low and rainfall is moderate. Compare the average high, low, and precipitation for each month in the table above to pick the window that fits the weather you want.

Has Dallas gotten hotter?

Yes. The warming-stripes chart above plots Dallas's annual mean temperature for every complete year of station data from 1940 to 2025, and the trend line fitted to 1940–2025 rises about 3.4°F (+0.40°F per decade) — recent decades average warmer than the start of that window.

What is the record high temperature in Dallas?

Dallas's all-time record high — the hottest single day in the station record — is shown in the records section above, along with the date it occurred. Records are drawn from the nearest long-term weather station's full daily history, which begins in 1939, so they capture the most extreme heat on record, not just a typical summer day.

What is the record low temperature in Dallas?

Dallas's all-time record low and the date it was set appear in the records section above. Like the record high, it comes from the station's full daily history back to 1939, so it reflects the coldest day on record rather than an average winter low.

Dallas, Texas Climate

Dallas weather by month — average highs and lows, rainfall, all-time records, and the warming record since 1940

Hottest month: 97°FAugust average high
Coldest month: 38°FJanuary average low
Precipitation: 38.3 ina year
Snowfall: 1.7 ina year

1991–2020 NOAA climate normals

At 12:53 AM CDT on Sep 21 it was 78°F in Dallas — 5° above the 73°F typical for that hour (estimated from the Sep 21 normal high of 88°F and low of 68°F, interpolated from the monthly normals).

Dallas weather by month

Average high, low, and rainfall for every month, from Dallas’s 1991–2020 climate normals, the standard 30-year reference period. Each band runs from the month’s average low to its average high: a tall band is a big day-to-night swing.

58°38°

2.6″Jan

62°42°

2.8″Feb

70°49°

3.5″Mar

77°57°

3.1″Apr

85°66°

4.6″May

93°74°

3.8″Jun

97°78°

1.7″Jul

97°77°

2.2″Aug

90°70°

3.1″Sep

80°59°

4.8″Oct

68°48°

2.9″Nov

59°40°

3.2″Dec

Average high → low (°F)Rainfall (inches)1991–2020 normals

Dallas monthly weather averages — average high, average low, and rainfall for each month, from the 1991–2020 U.S. Climate Normals (NOAA).
Month	Avg High	Avg Low	Rainfall
January	58°F	38°F	2.6 in
February	62°F	42°F	2.8 in
March	70°F	49°F	3.5 in
April	77°F	57°F	3.1 in
May	85°F	66°F	4.6 in
June	93°F	74°F	3.8 in
July	97°F	78°F	1.7 in
August	97°F	77°F	2.2 in
September	90°F	70°F	3.1 in
October	80°F	59°F	4.8 in
November	68°F	48°F	2.9 in
December	59°F	40°F	3.2 in
Annual	78°F	58°F	38.3 in

Dallas’s warming record since 1940

Dallas has warmed 3.4°F since 1940 (+0.40°F per decade, 1940–2025 trend)Gaps are years with incomplete station data.

Not what a typical year looks like, but how the typical year has changed. Each stripe is one complete year’s average temperature at the station, 1940 to 2025, colored against the mean of those years: blue for cooler years, red for warmer ones. The figure under the stripes is the least-squares trend line fitted to 1940–2025 — Dallas averages about 3.4°F warmer by that trend than in 1940.

Compared with the national rankingThe fastest-warming cities ranking fits every city to the same years, 1970–2025, so rates compare like for like. Over that window Dallas warms at +0.58°F per decade, #31 of 66. The figure above uses the station’s own record, 1940–2025, so the two rates differ.

Dallas rainfall by month

Dallas averages 38.3 inches of precipitation a year. The wettest month is October and the driest is July.

Dallas also averages 1.7 inches of snowfall a year.

Dallas temperature records

All-time record high: 112°Fset June 26, 1980
All-time record low: 0°Fset January 23, 1940

Records are drawn from the nearest long-term weather station’s full daily history, so they capture the most extreme single day Dallas has recorded — not a typical seasonal high or low.

Frequently asked

What is the hottest month in Dallas?: August is Dallas's hottest month, with the highest average daily high of the year. The month-by-month table above shows Dallas's exact average high and low for each month, based on the 1991–2020 climate normals — the standard 30-year reference period meteorologists use.
What is the coldest month in Dallas?: January is Dallas's coldest month, with the lowest average daily low of the year. The averages-by-month chart above gives the exact average high and low for every month, so you can see how cold a typical winter day runs.
How much does it rain in Dallas?: Dallas's total annual precipitation and its wettest and driest months are shown in the rainfall-by-month section above. Those figures are 1991–2020 normals — the average monthly precipitation total across that 30-year window — so they reflect a typical year rather than any single wet or dry season.
What months are best to visit Dallas?: The most comfortable months in Dallas are usually the shoulder seasons — spring and fall — when temperatures sit between the summer peak and winter low and rainfall is moderate. Compare the average high, low, and precipitation for each month in the table above to pick the window that fits the weather you want.
Has Dallas gotten hotter?: Yes. The warming-stripes chart above plots Dallas's annual mean temperature for every complete year of station data from 1940 to 2025, and the trend line fitted to 1940–2025 rises about 3.4°F (+0.40°F per decade) — recent decades average warmer than the start of that window.
What is the record high temperature in Dallas?: Dallas's all-time record high — the hottest single day in the station record — is shown in the records section above, along with the date it occurred. Records are drawn from the nearest long-term weather station's full daily history, which begins in 1939, so they capture the most extreme heat on record, not just a typical summer day.
What is the record low temperature in Dallas?: Dallas's all-time record low and the date it was set appear in the records section above. Like the record high, it comes from the station's full daily history back to 1939, so it reflects the coldest day on record rather than an average winter low.