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 | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 55° | 37° | 7 | 2.8 in | 7.3 h/day | 10.2 h | 24% | 66% |
| February | 59° | 40° | 9 | 4.1 in | 7.1 h/day | 11.0 h | 31% | 69% |
| March | 68° | 50° | 11 | 4.9 in | 8.0 h/day | 11.9 h | 35% | 68% |
| April | 74° | 55° | 11 | 6.7 in | 9.1 h/day | 13.0 h | 36% | 68% |
| May | 82° | 65° | 15 | 8.3 in | 9.4 h/day | 13.8 h | 48% | 74% |
| June | 89° | 72° | 10 | 4.9 in | 11.4 h/day | 14.3 h | 34% | 70% |
| July | 94° | 77° | 9 | 2.5 in | 12.1 h/day | 14.1 h | 30% | 62% |
| August | 93° | 77° | 9 | 4.5 in | 11.7 h/day | 13.4 h | 29% | 61% |
| September | 88° | 71° | 9 | 4.3 in | 10.3 h/day | 12.3 h | 29% | 64% |
| October | 78° | 60° | 8 | 6.3 in | 9.1 h/day | 11.3 h | 25% | 62% |
| November | 66° | 49° | 8 | 3.9 in | 7.5 h/day | 10.4 h | 27% | 70% |
| December | 59° | 42° | 8 | 3.8 in | 6.9 h/day | 10.0 h | 25% | 70% |
Plano month by month
Average high and low for each month, with the bar showing where it sits in Plano's year (left is the coldest night, right is the warmest afternoon).
January
- Rain
- 7 days
- Sunshine
- 7.3 h
- Daylight
- 10.2 h
February
- Rain
- 9 days
- Sunshine
- 7.1 h
- Daylight
- 11.0 h
March
- Rain
- 11 days
- Sunshine
- 8.0 h
- Daylight
- 11.9 h
April
- Rain
- 11 days
- Sunshine
- 9.1 h
- Daylight
- 13.0 h
May
- Rain
- 15 days
- Sunshine
- 9.4 h
- Daylight
- 13.8 h
June
- Rain
- 10 days
- Sunshine
- 11.4 h
- Daylight
- 14.3 h
July
- Rain
- 9 days
- Sunshine
- 12.1 h
- Daylight
- 14.1 h
August
- Rain
- 9 days
- Sunshine
- 11.7 h
- Daylight
- 13.4 h
September
- Rain
- 9 days
- Sunshine
- 10.3 h
- Daylight
- 12.3 h
October
- Rain
- 8 days
- Sunshine
- 9.1 h
- Daylight
- 11.3 h
November
- Rain
- 8 days
- Sunshine
- 7.5 h
- Daylight
- 10.4 h
December
- Rain
- 8 days
- Sunshine
- 6.9 h
- Daylight
- 10.0 h
Warmer places to go, by month: January · February · March · April · May · June · July · August · September · October · November · December
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. Need the precipitation in other units? The mm-to-inches rainfall converter handles it.