Plano, TX Climate & Monthly Averages
The climate of Plano
Plano has a humid subtropical climate, marked by hot, humid summers and generally mild winters. Average daytime highs range from about 55°F (13°C) in January to around 94°F (34°C) in July, and the city records roughly 113 days of measurable precipitation a year.
Climate quick facts
- Hottest month: July - highs near 94°F (34°C)
- Coldest month: January - highs near 55°F (13°C)
- Record high: 109°F (43°C) · Record low: -6°F (-21°C) (2015–2024)
- Wettest month: May (15 rainy days) · Sunniest: July (12.1 h sun/day)
- Climate type: humid subtropical - hot, humid summers and generally mild winters
- Snow: about 1 days a year
Temperatures through the year
The warmest stretch of the year centers on July. Highs average 94°F (34°C) and overnight lows stay near 77°F (25°C). The coolest month is January, with typical highs of 55°F (13°C) and lows around 37°F (3°C). Based on 2015–2024 weather data, temperatures have reached as high as 109°F (43°C) and dropped as low as -6°F (-21°C).
Rain, sun and snow
May is usually the wettest month. It brings about 8.3 inches (211 mm) of rain over 15 days, while July is the driest. July brings the most sunshine, averaging 12.1 hours of sun a day. Snowfall is rare but not unheard of.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 55° | 37° | 7 | 2.8 in | 7.3 h/day | 66% |
| February | 59° | 40° | 9 | 4.1 in | 7.1 h/day | 69% |
| March | 68° | 50° | 11 | 4.9 in | 8.0 h/day | 68% |
| April | 74° | 55° | 11 | 6.7 in | 9.1 h/day | 68% |
| May | 82° | 65° | 15 | 8.3 in | 9.4 h/day | 74% |
| June | 89° | 72° | 10 | 4.9 in | 11.4 h/day | 70% |
| July | 94° | 77° | 9 | 2.5 in | 12.1 h/day | 62% |
| August | 93° | 77° | 9 | 4.5 in | 11.7 h/day | 61% |
| September | 88° | 71° | 9 | 4.3 in | 10.3 h/day | 64% |
| October | 78° | 60° | 8 | 6.3 in | 9.1 h/day | 62% |
| November | 66° | 49° | 8 | 3.9 in | 7.5 h/day | 70% |
| December | 59° | 42° | 8 | 3.8 in | 6.9 h/day | 70% |
Plano month by month
Plano weather in January
January brings highs around 55°F (13°C), lows near 37°F (3°C), about 7 wet days - typically the coldest month of the year in Plano.
Plano weather in February
February brings highs around 59°F (15°C), lows near 40°F (5°C), about 9 wet days.
Plano weather in March
March brings highs around 68°F (20°C), lows near 50°F (10°C), about 11 wet days.
Plano weather in April
April brings highs around 74°F (23°C), lows near 55°F (13°C), about 11 wet days.
Plano weather in May
May brings highs around 82°F (28°C), lows near 65°F (18°C), about 15 wet days - typically the wettest month of the year in Plano.
Plano weather in June
June brings highs around 89°F (32°C), lows near 72°F (22°C), about 10 wet days.
Plano weather in July
July brings highs around 94°F (34°C), lows near 77°F (25°C), about 9 wet days - typically the hottest month and the driest month and the sunniest month of the year in Plano.
Plano weather in August
August brings highs around 93°F (34°C), lows near 77°F (25°C), about 9 wet days.
Plano weather in September
September brings highs around 88°F (31°C), lows near 71°F (22°C), about 9 wet days.
Plano weather in October
October brings highs around 78°F (26°C), lows near 60°F (16°C), about 8 wet days.
Plano weather in November
November brings highs around 66°F (19°C), lows near 49°F (9°C), about 8 wet days.
Plano weather in December
December brings highs around 59°F (15°C), lows near 42°F (6°C), about 8 wet days.
Seasons in Plano
Spring (March through May)
Spring in Plano brings comfortable warmth, with daytime highs averaging 74°F (24°C) and nights around 57°F (14°C); expect showers on roughly 36 days across the season.
Summer (June through August)
Summer in Plano turns very hot, with daytime highs averaging 92°F (33°C) and nights around 75°F (24°C); expect showers on roughly 28 days across the season.
Fall (September through November)
Fall in Plano is mild and warm, with daytime highs averaging 77°F (25°C) and nights around 60°F (15°C); expect showers on roughly 24 days across the season.
Winter (December through February)
Winter in Plano is mild, with daytime highs averaging 58°F (14°C) and nights around 40°F (4°C); expect showers on roughly 24 days across the season.
Climate questions, answered
What is the average temperature in Plano?
Is Plano hot in summer?
Is Plano cold in winter?
How many rainy days does Plano get in a year?
Best time to visit Plano
The best time to visit Plano is generally February to April and October to December, when warm days, manageable rainfall and plenty of daylight line up. Daytime temperatures in that window typically sit near 67°F (20°C).
Pack for Plano with lightweight, breathable clothing and strong sun protection for the hot months; a warm jacket and layers for the cooler season; a compact umbrella or rain shell - showers are a regular feature. Evenings can feel noticeably cooler than afternoons - July nights average 77°F (25°C).
Plano temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.