UV Index for Merrimack, NH

Current Merrimack UV Index

0 (Low)

Last Updated 27 minutes ago

Hourly Merrimack UV Index

The hourly Merrimack, NH UV Index forecast for Tuesday, August 26th, 2025.

5 Day Hourly Merrimack UV Index Forecast

Last Updated 10 hours ago

The UV index forecast for the next five days in Merrimack, NH has no days reaching the extreme level and 3 days reaching the high or very high levels. The peak UV intensity in Merrimack over the next five days will be 7 on Tuesday, August 26th at 1:00 pm.

The UV index forecast for Tuesday, August 26th in Merrimack, NH is below.

Time UV Index Risk
1am 0
Low
2am 0
Low
3am 0
Low
4am 0
Low
5am 0
Low
6am 0
Low
7am 0.2
Low
8am 0.8
Low
9am 2
Low
10am 3.7
Moderate
11am 5.4
Moderate
12pm 6.7
High
1pm 7
High
2pm 6.3
High
3pm 4.5
Moderate
4pm 2.5
Low
5pm 1.2
Low
6pm 0.3
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Wednesday, August 27th in Merrimack, NH 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 0.2
Low
8am 0.8
Low
9am 1.9
Low
10am 3.5
Moderate
11am 5.1
Moderate
12pm 6.2
High
1pm 6.4
High
2pm 2.9
Low
3pm 1.4
Low
4pm 2.3
Low
5pm 1.2
Low
6pm 0.1
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Thursday, August 28th in Merrimack, NH 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 0.2
Low
8am 0.8
Low
9am 1.9
Low
10am 3.3
Moderate
11am 4.8
Moderate
12pm 6.3
High
1pm 6.4
High
2pm 6.1
High
3pm 4.6
Moderate
4pm 2.9
Low
5pm 1.4
Low
6pm 0.3
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Friday, August 29th in Merrimack, NH 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 0.2
Low
8am 0.6
Low