Dallas Climate & Weather Averages
United States · Humid Subtropical climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
Best Time to Visit Dallas
Based on temperature comfort, low rainfall, and sunshine hours, the best months to visit Dallas are:
May, October, September
Scores based on ideal temperature (18-28°C), low precipitation, and high sunshine. May scores 63/100.
Dallas has a Humid Subtropical climate with hot summers and mild winters. The warmest month is August with an average temperature of 30.7°C (87.3°F), while January is the coldest at 8.4°C (47.1°F). Annual precipitation averages 1408.0mm spread across approximately 153.0 rainy days per year, with May being the wettest month at 214.3mm and September the driest at 72.8mm. The city receives an average of 7.1-12.1 hours of sunshine per day, with the sunniest months being August and July. Humidity remains relatively consistent throughout the year, averaging around 64.7% annually, while average wind speeds reach 22.2 km/h. The overall annual mean temperature is 19.8°C (67.6°F), reflecting the humid subtropical conditions shaped by Dallas's latitude (32.78°) and surrounding geography. For travelers, the best time to visit is May, October, September, when temperatures are comfortable and rainfall is lower.
Dallas's climate is characterized by hot summers and mild winters, with occasional severe weather. I tracked the data and found that the city experiences some of the most dramatic temperature swings in Texas. The best time for visiting is October to April, when temperatures are pleasant and the risk of severe weather is lower. Spring and autumn are particularly comfortable.
Seasonal Climate Overview
Spring (Mar-May)
Average temperature 19.1°C (66.4°F), rainfall 174.6mm, sunshine 9.0 hrs/day, humidity 69.0%. Mild transitional weather characterizes this period. Expect around 16.5 rainy days per month.
Summer (Jun-Aug)
Average temperature 29.5°C (85.1°F), rainfall 99.2mm, sunshine 11.8 hrs/day, humidity 61.3%. Warm season conditions prevail. Expect around 13.4 rainy days per month.
Autumn (Sep-Nov)
Average temperature 20.6°C (69.1°F), rainfall 105.0mm, sunshine 9.4 hrs/day, humidity 62.0%. Mild transitional weather characterizes this period. Expect around 9.9 rainy days per month.
Winter (Dec-Feb)
Average temperature 9.8°C (49.6°F), rainfall 90.4mm, sunshine 7.2 hrs/day, humidity 66.8%. Mild transitional weather characterizes this period. Expect around 11.2 rainy days per month.
Monthly Temperature Averages (°C / °F)
| Month | Avg High | Avg Low | Mean Temp |
|---|---|---|---|
| January | 13.8°C (56.8°F) | 3.6°C (38.5°F) | 8.4°C (47.1°F) |
| February | 15.1°C (59.2°F) | 4.1°C (39.4°F) | 9.3°C (48.7°F) |
| March | 21.3°C (70.3°F) | 10.4°C (50.7°F) | 15.6°C (60.1°F) |
| April | 24.1°C (75.4°F) | 13.5°C (56.3°F) | 18.6°C (65.5°F) |
| May | 28.3°C (82.9°F) | 18.7°C (65.7°F) | 23.2°C (73.8°F) |
| June | 32.8°C (91.0°F) | 23.1°C (73.6°F) | 27.8°C (82.0°F) |
| July | 35.2°C (95.4°F) | 25.3°C (77.5°F) | 30.1°C (86.2°F) |
| August | 36.0°C (96.8°F) | 25.7°C (78.3°F) | 30.7°C (87.3°F) |
| September | 31.7°C (89.1°F) | 21.5°C (70.7°F) | 26.3°C (79.3°F) |
| October | 26.9°C (80.4°F) | 15.8°C (60.4°F) | 21.1°C (70.0°F) |
| November | 19.6°C (67.3°F) | 9.7°C (49.5°F) | 14.5°C (58.1°F) |
| December | 16.7°C (62.1°F) | 6.9°C (44.4°F) | 11.6°C (52.9°F) |
Monthly Precipitation (mm)
| Month | Avg Rainfall | Bar |
|---|---|---|
| January | 79.6 mm | |
| February | 101.9 mm | |
| March | 154.5 mm | |
| April | 155.1 mm | |
| May | 214.3 mm | |
| June | 121.9 mm | |
| July | 88.7 mm | |
| August | 87.1 mm | |
| September | 72.8 mm | |
| October | 126.9 mm | |
| November | 115.2 mm | |
| December | 89.8 mm |
Monthly Rainy Days (avg days with rain > 0.1mm)
| Month | Avg Rainy Days | Bar |
|---|---|---|
| January | 11.0 | |
| February | 11.0 | |
| March | 15.6 | |
| April | 15.0 | |
| May | 18.8 | |
| June | 14.4 | |
| July | 14.4 | |
| August | 11.4 | |
| September | 12.2 | |
| October | 8.0 | |
| November | 9.4 | |
| December | 11.6 |
Monthly Humidity (%)
| Month | Avg Humidity | Bar |
|---|---|---|
| January | 65.4% | |
| February | 66.0% | |
| March | 67.0% | |
| April | 66.5% | |
| May | 73.4% | |
| June | 67.4% | |
| July | 61.0% | |
| August | 55.5% | |
| September | 60.2% | |
| October | 57.3% | |
| November | 68.4% | |
| December | 68.9% |
Monthly Wind Speed (avg max km/h)
| Month | Avg Max Wind | Bar |
|---|---|---|
| January | 22.9 km/h | |
| February | 24.7 km/h | |
| March | 25.9 km/h | |
| April | 26.5 km/h | |
| May | 23.6 km/h | |
| June | 21.2 km/h | |
| July | 20.3 km/h | |
| August | 19.5 km/h | |
| September | 18.0 km/h | |
| October | 21.7 km/h | |
| November | 20.6 km/h | |
| December | 21.2 km/h |
Monthly UV Index (avg max)
| Month | UV Index | Risk Level | Bar |
|---|---|---|---|
| January | — | — | |
| February | — | — | |
| March | — | — | |
| April | — | — | |
| May | — | — | |
| June | — | — | |
| July | — | — | |
| August | — | — | |
| September | — | — | |
| October | — | — | |
| November | — | — | |
| December | — | — |
Monthly Snowfall (cm)
| Month | Avg Snowfall | Bar |
|---|---|---|
| January | 0.7 cm | |
| February | 2.0 cm | |
| March | 1.1 cm | |
| April | 0.0 cm | |
| May | 0.0 cm | |
| June | 0.0 cm | |
| July | 0.0 cm | |
| August | 0.0 cm | |
| September | 0.0 cm | |
| October | 0.0 cm | |
| November | 0.1 cm | |
| December | 0.0 cm |
Monthly Sunshine Hours (daily average)
| Month | Avg Daily Sunshine | Bar |
|---|---|---|
| January | 7.1 hrs | |
| February | 7.4 hrs | |
| March | 8.3 hrs | |
| April | 9.3 hrs | |
| May | 9.4 hrs | |
| June | 11.3 hrs | |
| July | 12.0 hrs | |
| August | 12.1 hrs | |
| September | 10.6 hrs | |
| October | 9.6 hrs | |
| November | 7.9 hrs | |
| December | 7.1 hrs |
Frequently Asked Questions
What is the hottest month in Dallas?
August is the hottest month with an average temperature of 30.7°C (87.3°F).
What is the coldest month in Dallas?
January is the coldest month with an average temperature of 8.4°C (47.1°F).
What is the rainiest month in Dallas?
May is the wettest month with an average of 214.3mm of precipitation. The city experiences about 153.0 rainy days per year.
When is the best time to visit Dallas?
The best time to visit Dallas is during May, October, September, when temperatures are comfortable and rainfall is lower.
Cities with Similar Climate (Humid Subtropical)
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Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 32.78°, -96.81°. Timezone: America/Chicago. Last updated: 2026-07-30.