UV Index Today in McKinney, Texas (TX)

Sunday, September 20, 2026 -11:22 AM CDT (GMT-5)

The UV Index in McKinney, Texas (TX) right now is 4.6. This reading was last updated at 11:00 AM CDT, about 22 minutes ago. The UV Index at12:00 PM CDT, in about 37 minutes from now, is expected to be 6.3.

The maximum UV Index today in McKinney is expected to be 7.3 at 1:00 PM CDT,1 hour and 37 minutes from now. The maximum UV Index tomorrow is expected to be 7.8 at 1:00 PM CDT.

Data Source: National Oceanic and Atmospheric Administration (NOAA)

Today

September 20
7.3
1:00 PM CDT
High

Tomorrow

September 21
7.8
1:00 PM CDT
Very High

UV Index Today Hourly

September 20

Based on the latest forecast, McKinney, Texas (TX) will see a peak UV Index of 7.3today around 1:00 PM CDT, which is classified as High risk.

02468107 AM8 AM9 AM10 AM11 AM12 PM1 PM2 PM3 PM4 PM5 PM6 PM7 PM8 PMCentral Daylight Time (CDT, GMT-5)Now: 11:22 AM00.20.92.54.66.37.37.16.84.52.30.80.10
Data Source: National Oceanic and Atmospheric Administration (NOAA)

UV Index Tomorrow Hourly

September 21

The sun will be strongest in McKinney, Texas (TX) around 1:00 PM CDT tomorrow, with a UV Index of 7.8 (Very High risk).

02468107 AM8 AM9 AM10 AM11 AM12 PM1 PM2 PM3 PM4 PM5 PM6 PM7 PM8 PMCentral Daylight Time (CDT, GMT-5)00.20.92.34.36.57.87.76.44.62.30.80.10
Data Source: National Oceanic and Atmospheric Administration (NOAA)

5 Day UV Index Forecast

September 19, 2026

TimeUV IndexRisk
12:00 AM0
Low
1:00 AM0
Low
2:00 AM0
Low
3:00 AM0
Low
4:00 AM0
Low
5:00 AM0
Low
6:00 AM0
Low
7:00 AM0
Low
8:00 AM0.2
Low
9:00 AM0.9
Low
10:00 AM2.5
Moderate
11:00 AM4.7
Moderate
12:00 PM6.4
High
1:00 PM7.5
Very High
2:00 PM7.5
Very High
3:00 PM6.4
High
4:00 PM4.4
Moderate
5:00 PM2.3
Low
6:00 PM0.8
Low
7:00 PM0.1
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

September 20, 2026

TimeUV IndexRisk
12:00 AM0
Low
1:00 AM0
Low
2:00 AM0
Low
3:00 AM0
Low
4:00 AM0
Low
5:00 AM0
Low
6:00 AM0
Low
7:00 AM0
Low
8:00 AM0.2
Low
9:00 AM0.9
Low
10:00 AM2.5
Moderate
11:00 AM4.6
Moderate
12:00 PM6.3
High
1:00 PM7.3
High
2:00 PM7.1
High
3:00 PM6.8
High
4:00 PM4.5
Moderate
5:00 PM2.3
Low
6:00 PM0.8
Low
7:00 PM0.1
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

September 21, 2026

TimeUV IndexRisk
12:00 AM0
Low
1:00 AM0
Low
2:00 AM0
Low
3:00 AM0
Low
4:00 AM0
Low
5:00 AM0
Low
6:00 AM0
Low
7:00 AM0
Low
8:00 AM0.2
Low
9:00 AM0.9
Low
10:00 AM2.3
Low
11:00 AM4.3
Moderate
12:00 PM6.5
High
1:00 PM7.8
Very High
2:00 PM7.7
Very High
3:00 PM6.4
High
4:00 PM4.6
Moderate
5:00 PM2.3
Low
6:00 PM0.8
Low
7:00 PM0.1
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

September 22, 2026

TimeUV IndexRisk
12:00 AM0
Low
1:00 AM0
Low
2:00 AM0
Low
3:00 AM0
Low
4:00 AM0
Low
5:00 AM0
Low
6:00 AM0
Low
7:00 AM0
Low
8:00 AM0.2
Low
9:00 AM0.9
Low
10:00 AM2.6
Moderate
11:00 AM4.9
Moderate
12:00 PM7.2
High
1:00 PM8.5
Very High
2:00 PM8.4
Very High
3:00 PM6.9
High
4:00 PM4.7
Moderate
5:00 PM2.4
Low
6:00 PM0.8
Low
7:00 PM0
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

September 23, 2026

TimeUV IndexRisk
12:00 AM0
Low
1:00 AM0
Low
2:00 AM0
Low
3:00 AM0
Low
4:00 AM0
Low
5:00 AM0
Low
6:00 AM0
Low
7:00 AM0
Low
8:00 AM0.1
Low
9:00 AM0.9
Low
10:00 AM2.5
Moderate
11:00 AM4.7
Moderate
12:00 PM6.9
High
1:00 PM8.2
Very High
2:00 PM8.2
Very High
3:00 PM6.7
High
4:00 PM4.2
Moderate
5:00 PM2
Low
6:00 PM0.6
Low
7:00 PM0
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low
Data Source: National Oceanic and Atmospheric Administration (NOAA)

Nearby Places

Maximum UV Index Today
  • Frisco - 7.3
  • Plano - 7.5
Data Source: National Oceanic and Atmospheric Administration (NOAA)