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Last Updated 3 minutes ago
The hourly Waltham, MA UV Index forecast for Saturday, October 18th, 2025.
Last Updated 13 hours ago
The UV index forecast for the next five days in Waltham, MA has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in Waltham over the next five days will be 3.6 on Sunday, October 19th at 1:00 pm.
The UV index forecast for Saturday, October 18th in Waltham, MA is below.
Time | UV Index | Risk |
---|---|---|
4am | 0 |
Low |
5am | 0 |
Low |
6am | 0 |
Low |
7am | 0 |
Low |
8am | 0.1 |
Low |
9am | 0.6 |
Low |
10am | 1.4 |
Low |
11am | 2.5 |
Low |
12pm | 3.2 |
Moderate |
1pm | 3.4 |
Moderate |
2pm | 3 |
Moderate |
3pm | 2 |
Low |
4pm | 1 |
Low |
5pm | 0.4 |
Low |
6pm | 0 |
Low |
7pm | 0 |
Low |
8pm | 0 |
Low |
9pm | 0 |
Low |
10pm | 0 |
Low |
11pm | 0 |
Low |
The UV index forecast for Sunday, October 19th in Waltham, MA is below.
Time | UV Index | Risk |
---|---|---|
12am | 0 |
Low |
1am | 0 |
Low |
2am | 0 |
Low |
3am | 0 |
Low |
4am | 0 |
Low |
5am | 0 |
Low |
6am | 0 |
Low |
7am | 0 |
Low |
8am | 0.1 |
Low |
9am | 0.6 |
Low |
10am | 1.4 |
Low |
11am | 2.5 |
Low |
12pm | 3.3 |
Moderate |
1pm | 3.6 |
Moderate |
2pm | 3 |
Moderate |
3pm | 2.1 |
Low |
4pm | 1 |
Low |
5pm | 0.3 |
Low |
6pm | 0 |
Low |
7pm | 0 |
Low |
8pm | 0 |
Low |
9pm | 0 |
Low |
10pm | 0 |
Low |
11pm | 0 |
Low |
The UV index forecast for Monday, October 20th in Waltham, MA is below.
Time | UV Index | Risk |
---|---|---|
12am | 0 |
Low |
1am | 0 |
Low |
2am | 0 |
Low |
3am | 0 |
Low |
4am | 0 |
Low |
5am | 0 |
Low |
6am | 0 |
Low |
7am | 0 |
Low |
8am | 0 |
Low |
9am | 0 |
Low |
10am | 0.2 |
Low |
11am | 0.3 |
Low |
12pm | 1.4 |
Low |
1pm | 1.6 |
Low |
2pm | 2.3 |
Low |
3pm | 1.8 |
Low |
4pm | 0.8 |
Low |
5pm | 0.1 |
Low |
6pm | 0 |
Low |
7pm | 0 |
Low |
8pm | 0 |
Low |
9pm | 0 |
Low |
10pm | 0 |
Low |
11pm | 0 |
Low |
The UV index forecast for Tuesday, October 21st in Waltham, MA is below.
Time | UV Index | Risk |
---|---|---|
12am | 0 |
Low |
1am | 0 |
Low |
2am | 0 |
Low |
3am | 0 |
Low |
4am | 0 |
Low |
5am | 0 |
Low |
6am | 0 |
Low |
7am | 0 |
Low |
8am | 0.1 |
Low |