Weather in McKinney, Texas
Roses open on the Piedmont edge. Day 59 of spring. Read this microseason across nine climate regions →
- TodayMay 17Drizzle12%88°74°
- MondayMay 18Thunderstorm14%91°76°
- TuesdayMay 19Thunderstorm54%88°68°
- WednesdayMay 20Drizzle49%84°65°
- ThursdayMay 21Showers57%79°67°
- FridayMay 22Light Drizzle50%79°67°
- SaturdayMay 23Overcast29%86°66°
- PM 2.5
- 9.3 μg/m³
- PM 10
- 12.7 μg/m³
- NO₂
- 6.2 μg/m³
- Ozone
- 85.0 μg/m³
- UV Index
- 0.0 Low
When the dew is on the grass, rain will never come to pass.
- Moonrise
- 11:41 AM
- Moonset
- 1:45 AM
- In sign
- ♊︎ Gemini
Roses open on the Piedmont edge
McKinney at a glance
- Today vs. normal: 77°F — typical for the season
- Last frost: March 6 (climatological average for this latitude)
- Microseason: 28 of 72, May 16–20
- Planting window: Direct sow okra, melons, and southern peas. Thin carrot rows.
Right now in the garden
Peak growing season
As of May 17, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | lettuce, peas, spinach, radishes | — |
| April | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | — |
| May | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | — | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | — | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | fall brassicas, garlic (overwinter), carrots | — |
| December | — | — |
A year in weather
July brings McKinney's warmest temperatures (~85°F mean) while January delivers the coldest (~46°F). October sees peak rainfall at 5.3 inches, while July receives the least at 2.2 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 46° | 2.8″ | 5 |
| February | 50° | 3.4″ | 5 |
| March | 58° | 3.6″ | 6 |
| April | 65° | 3.5″ | 5 |
| May | 73° | 5.2″ | 7 |
| June | 81° | 3.8″ | 5 |
| July | 85° | 2.2″ | 4 |
| August | 85° | 2.5″ | 4 |
| September | 77° | 3.3″ | 4 |
| October | 67° | 5.3″ | 6 |
| November | 56° | 3.0″ | 4 |
| December | 48° | 3.4″ | 4 |
Regional context
McKinney belongs to the humid subtropical climate region, sharing similar temperature ranges, seasonal patterns, and growing conditions with nearby cities.
Similar climates: Houston, TX, Dallas, TX, San Antonio, TX, Austin, TX, Fort Worth, TX.
Naturalist notes
Late April brings the return of Mississippi Kites to McKinney, their sleek forms cutting through warming air as they hunt insects above the tree canopy.
Texas Redbud trees burst into magenta bloom throughout March, their heart-shaped leaves emerging after the flowers fade.
Frequently asked
- When does it freeze in McKinney?
- McKinney's last spring frost typically falls around mid-March, and the first fall frost arrives around mid-December.
- What is the rainy season in McKinney?
- October is the wettest month with about 5.3 inches of rain on average; the city receives roughly 42 inches annually.
- What is the warmest month in McKinney?
- July is typically warmest, averaging about 85°F.
- What is the coldest month in McKinney?
- January is typically coldest, averaging about 46°F.
- When can I start a vegetable garden in McKinney?
- Cool-season crops (peas, lettuce) can be sown around the last spring frost (mid-March); warm-season crops (tomatoes, peppers) wait until 1–2 weeks after.
- How many rainy days does McKinney get?
- McKinney averages about 57 rainy days per year.
- What hardiness zone is McKinney?
- McKinney's USDA hardiness zone is determined by its lowest average winter temperature; check the USDA's online lookup with the city ZIP for the current zone designation.
Climate
McKinney, Texas sits in a humid subtropical climate zone. January temperatures hover near 46°F while July averages 85°F — a 39°F seasonal swing.
Throughout the year, McKinney receives about 42 inches of precipitation spread over roughly 57 rainy days.
Geography shapes McKinney's weather patterns through its latitude (33.2°N), proximity to large water bodies, and elevation. These factors determine what grows here, when frost arrives, and the daily weather patterns residents experience.