What is the hottest month in Houston?

August is Houston's hottest month, with the highest average daily high of the year. The month-by-month table above shows Houston'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 Houston?

January is Houston'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 Houston?

Houston'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 Houston?

The most comfortable months in Houston 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 Houston gotten hotter?

Yes. The warming-stripes chart above plots Houston's annual mean temperature for every complete year of station data from 1931 to 2025, and the trend line fitted to 1931–2025 rises about 3.8°F (+0.40°F per decade) — recent decades average warmer than the start of that window.

What is the record high temperature in Houston?

Houston'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 1930, so they capture the most extreme heat on record, not just a typical summer day.

What is the record low temperature in Houston?

Houston'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 1930, so it reflects the coldest day on record rather than an average winter low.

Houston, Texas Climate

Houston weather by month — average highs and lows, rainfall, all-time records, and the warming record since 1931

Hottest month: 94°FAugust average high
Coldest month: 46°FJanuary average low
Precipitation: 55.6 ina year
Wettest month: June6.1 in on average

1991–2020 NOAA climate normals

At 9:14 AM CDT on Sep 21 it was 82°F in Houston — 6° above the 76°F typical for that hour (estimated from the Sep 21 normal high of 88°F and low of 71°F, interpolated from the monthly normals).

Houston weather by month

Average high, low, and rainfall for every month, from Houston’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.

64°46°

4.1″Jan

68°50°

2.9″Feb

73°56°

3.3″Mar

79°62°

4.1″Apr

86°69°

5.4″May

91°75°

6.1″Jun

93°77°

4.6″Jul

94°77°

5.4″Aug

89°73°

5.8″Sep

82°64°

5.8″Oct

73°54°

3.9″Nov

66°48°

4.3″Dec

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

Houston 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	64°F	46°F	4.1 in
February	68°F	50°F	2.9 in
March	73°F	56°F	3.3 in
April	79°F	62°F	4.1 in
May	86°F	69°F	5.4 in
June	91°F	75°F	6.1 in
July	93°F	77°F	4.6 in
August	94°F	77°F	5.4 in
September	89°F	73°F	5.8 in
October	82°F	64°F	5.8 in
November	73°F	54°F	3.9 in
December	66°F	48°F	4.3 in
Annual	80°F	63°F	55.6 in

Houston’s warming record since 1931

Houston has warmed 3.8°F since 1931 (+0.40°F per decade, 1931–2025 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, 1931 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 1931–2025 — Houston averages about 3.8°F warmer by that trend than in 1931.

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 Houston warms at +0.74°F per decade, #17 of 66. The figure above uses the station’s own record, 1931–2025, so the two rates differ.

Houston rainfall by month

Houston averages 55.6 inches of precipitation a year. The wettest month is June and the driest is February.

Houston temperature records

All-time record high: 109°Fset August 27, 2023
All-time record low: 5°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 Houston has recorded — not a typical seasonal high or low.

Frequently asked

What is the hottest month in Houston?: August is Houston's hottest month, with the highest average daily high of the year. The month-by-month table above shows Houston'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 Houston?: January is Houston'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 Houston?: Houston'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 Houston?: The most comfortable months in Houston 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 Houston gotten hotter?: Yes. The warming-stripes chart above plots Houston's annual mean temperature for every complete year of station data from 1931 to 2025, and the trend line fitted to 1931–2025 rises about 3.8°F (+0.40°F per decade) — recent decades average warmer than the start of that window.
What is the record high temperature in Houston?: Houston'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 1930, so they capture the most extreme heat on record, not just a typical summer day.
What is the record low temperature in Houston?: Houston'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 1930, so it reflects the coldest day on record rather than an average winter low.