Last updated: May 6, 2024
Under the Köppen–Geiger climate classification Richardson features a humid subtropical climate (Cfa).Temperatures typically range between 8 °C (47 °F) and 29 °C (85 °F) through the year, but rarely can drop to -18 °C (-1 °F) or can rise to as high as 42 °C (107 °F).The average annual precipitation amounts to about 1178 mm (46.4 inches) and receives 101 rainy days on the 1 mm (0.04 inches) threshold annually.Richardson enjoys an average of 3170 hours of sunshine throughout the year, and daylight varies from 10 hours 0 minutes to 14 hours 16 minutes per day.
The warmest months in Richardson are June, July and August, with daily mean temperatures ranging from 27 to 29 °C (81 - 85 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 8 to 11 °C (47 - 51 °F) throughout the day. On average each year, Richardson experiences 165 days above 25 °C (77.0 °F) and 20 days below 0 °C (32.0 °F).
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Maximum | 26°C (78°F) | 30°C (86°F) | 32°C (90°F) | 34°C (93°F) | 35°C (96°F) | 37°C (100°F) | 42°C (107°F) | 40°C (104°F) | 37°C (99°F) | 35°C (96°F) | 33°C (91°F) | 28°C (82°F) |
Mean maximum | 23°C (74°F) | 26°C (80°F) | 29°C (85°F) | 31°C (88°F) | 33°C (92°F) | 35°C (96°F) | 38°C (101°F) | 37°C (99°F) | 36°C (97°F) | 34°C (93°F) | 28°C (82°F) | 25°C (77°F) |
Average high | 14°C (57°F) | 15°C (59°F) | 21°C (70°F) | 24°C (75°F) | 28°C (83°F) | 32°C (90°F) | 34°C (94°F) | 34°C (93°F) | 31°C (88°F) | 25°C (78°F) | 19°C (67°F) | 16°C (61°F) |
Daily mean | 8°C (47°F) | 9°C (49°F) | 15°C (60°F) | 18°C (65°F) | 23°C (74°F) | 27°C (81°F) | 29°C (85°F) | 29°C (85°F) | 26°C (79°F) | 20°C (68°F) | 13°C (56°F) | 11°C (51°F) |
Average low | 3°C (38°F) | 4°C (40°F) | 10°C (51°F) | 13°C (55°F) | 19°C (66°F) | 23°C (73°F) | 25°C (77°F) | 24°C (76°F) | 21°C (71°F) | 15°C (59°F) | 8°C (47°F) | 6°C (43°F) |
Mean minimum | -6°C (21°F) | -6°C (22°F) | 1°C (33°F) | 4°C (39°F) | 11°C (53°F) | 19°C (67°F) | 22°C (71°F) | 21°C (71°F) | 15°C (59°F) | 4°C (40°F) | -1°C (31°F) | -2°C (29°F) |
Minimum | -11°C (12°F) | -18°C (-1°F) | -6°C (22°F) | 1°C (34°F) | 8°C (46°F) | 16°C (61°F) | 19°C (66°F) | 20°C (68°F) | 10°C (51°F) | 1°C (35°F) | -5°C (23°F) | -5°C (23°F) |
Compare temperature, precipitation, sunshine, UV index in Richardson, Texas, United States with other places around the world.
Richardson usually has the most precipitation in April, May and October, with an average of 10 rainy days and 148 mm (5.8 inches) of precipitation per month.The driest months in Richardson are January, July and November. On average, 56 mm (2.2 inches) of precipitation falls during these months.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Average precipitation mm (inches) | 59 (2.3) | 102 (4.0) | 120 (4.7) | 121 (4.8) | 177 (7.0) | 86 (3.4) | 50 (2.0) | 98 (3.9) | 92 (3.6) | 146 (5.8) | 58 (2.3) | 67 (2.6) |
Average precipitation days (≥ 1 mm) | 7 | 9 | 10 | 9 | 12 | 9 | 7 | 8 | 7 | 10 | 6 | 7 |
The sunniest months in Richardson are June, July and August, when the sun shines an average of 11 hours 11 minutes a day.Least sunny months in Richardson: January, February and December receive an average of 6 hours 17 minutes of sunshine daily.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Mean monthly sunshine hours | 172 | 172 | 238 | 258 | 283 | 342 | 357 | 329 | 284 | 262 | 240 | 227 |
Mean daily daylight hours | 10h 14m | 11h 0m | 11h 59m | 13h 1m | 13h 51m | 14h 16m | 14h 2m | 13h 17m | 12h 19m | 11h 18m | 10h 26m | 10h 0m |
Richardson experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 11 - 11, which corresponds to the Extreme category of sun exposure.January, February and December are in the Moderate / High exposure category. In these months, the maximum values of the UV index do not exceed 6. For more detailed information, check out our hourly Richardson UV Index data.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
UV Index (month maximum) | 4 | 6 | 8 | 10 | 11 | 11 | 11 | 11 | 10 | 8 | 6 | 4 |