Plano, TX Climate & Monthly Averages
The climate of Plano
Plano runs one of the wider annual swings in our dataset: 22°C separates the average July from the average January. Afternoons reach 94°F (34°C) at the peak of summer and 55°F (13°C) at the depth of winter, with 113 days of measurable precipitation through the year.
Climate quick facts
- Hottest month: July - highs near 94°F (34°C)
- Coldest month: January - highs near 55°F (13°C)
- Decade extremes (2015-2024): 109°F (43°C) high · -6°F (-21°C) low
- Wettest month: May (15 rainy days) · Sunniest: July (12.1 h sun/day)
- Climate type: humid subtropical
- Annual swing: 22°C between the average warmest and coolest month · day to night: 10°C
- Snow: about 1 days a year
- Months averaging 30°C or hotter: 4
- Average humidity: 67%
Temperatures through the year
Average highs hold at or above 30°C for 4 months of the year, June through September being the unbroken run. January sits at the other end of the year: 55°F (13°C) by day, 37°F (3°C) at night. At its warmest, in July, Plano runs to 94°F (34°C) in the afternoon and back to 77°F (25°C) by dawn. Relative humidity averages 67% across the year, drier than about 75% of the cities we track.
Rain, sun and snow
Snowfall is rare but not unheard of. Precipitation concentrates in May - 8.3 inches (211 mm) on 15 days - and thins out by July. July is the brightest month at 12.1 hours of sun a day, against an annual average of 9.2. The gridded 2015-2024 daily record for this location tops out at 109°F (43°C) and bottoms at -6°F (-21°C) - decade extremes, not all-time station records.
How Plano compares
- Plano sits close to the middle of our dataset on most measures: 66°F (19°C) as an annual average, 56.9 inches (1446 mm) of precipitation and 9.2 hours of sun a day.
Ranked against every city in our dataset, each measured on the same ten-year window.
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)
Through spring, Plano is pleasantly warm: 74°F (24°C) by day, 57°F (14°C) after dark, and rain falls on around 36 of the 90 days.
Summer (June through August)
Summer in Plano brings serious heat, with daytime highs averaging 92°F (33°C) and nights around 75°F (24°C); expect showers on roughly 28 days across the season. Daylight is generous - around 11.7 hours of sun a day.
Fall (September through November)
Through fall, Plano settles into easy warmth: 77°F (25°C) by day, 60°F (15°C) after dark, and 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
How long does summer last in Plano?
Is Plano cold in winter?
How often does it rain in Plano?
How much sun does Plano get?
Is Plano hot in summer?
Best time to visit Plano
Aim for February to April and October to December if you get the choice: warm days, manageable rainfall and plenty of daylight line up, and highs average 67°F (20°C) against roughly 9 wet days a month. For the same question asked the other way round, see where else is warm in February.
Pack for Plano with lightweight, breathable clothing and serious sun protection, a warm jacket and layers for the cooler season and a compact umbrella or rain shell. Note the gap between afternoon and night: July pairs 94°F (34°C) with 77°F (25°C).
Plano temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.