Grantham Weather Forecast 15 Days, Weather in Grantham Today
Current weather conditions and 15 day weather forecast for Grantham, New Hampshire, USA including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain risk, wind speed, cloud, pressure, and UV index.
Current weather conditions at Grantham
| 23 March 2026 Monday 1.1 ° C / 34°F  Patchy light snow |
Feels Like : 0.2 ° C / 32.3°F Humidity : % 88 Pressure : 1010 mb Wind Speed : 4 kmph / 2.5 miles from NE  Visibility : 4 km Precipitation (rainfall) : 0 mm Cloud (%) : 100 |
15 day weather forecast for Grantham, NH, USA
Weather Forecast for next 15 Days for Grantham including weather warnings, temperature, rain, wind speed, cloud, snow, wind speed and wind direction, pressure and UV index.Here is weather for the next 15 days in Grantham, New Hampshire state, US. To see the daily forecast, scroll to the table below.
| Date | Weather forecast | Low temperature | High temperature | Avg. temperature | Humidity | Chance of rain | UV Index | Sun Position | Moon Position | |
|---|---|---|---|---|---|---|---|---|---|---|
| 23 March 2026 Monday |  Patchy moderate snow |
-2.4 ° C (27.7°F) |
1.6 ° C (34.9°F) |
-0 ° C (32°F) |
% 87 | 84% | 0.6 | Sunrise:06:46 AM Sunset: 07:05 PM |
Moonrise:08:54 AM Moonset: 12:04 AM Moon Phase ( Waxing Crescent ) |
|
| 24 March 2026 Tuesday |  Partly Cloudy |
-4.1 ° C (24.6°F) |
6.7 ° C (44.1°F) |
0.3 ° C (32.5°F) |
% 60 | 0% | 1 | Sunrise:06:44 AM Sunset: 07:06 PM |
Moonrise:09:44 AM Moonset: 01:22 AM Moon Phase ( Waxing Crescent ) |
|
| 25 March 2026 Wednesday |  Overcast |
-1 ° C (30.2°F) |
8.1 ° C (46.6°F) |
3.2 ° C (37.7°F) |
% 52 | 0% | 0.7 | Sunrise:06:42 AM Sunset: 07:07 PM |
Moonrise:10:45 AM Moonset: 02:29 AM Moon Phase ( First Quarter ) |
|
| 26 March 2026 Thursday |  Patchy rain nearby |
0.6 ° C (33°F) |
5.9 ° C (42.6°F) |
3.7 ° C (38.6°F) |
% 92 | 86% | 0.3 | Sunrise:06:41 AM Sunset: 07:08 PM |
Moonrise:11:57 AM Moonset: 03:25 AM Moon Phase ( Waxing Gibbous ) |
|
| 27 March 2026 Friday | Patchy rain nearby |
-7.9 ° C (17.9°F) |
8.5 ° C (47.4°F) |
3.7 ° C (38.7°F) |
% 78 | 79% | 0 | Sunrise:06:39 AM Sunset: 07:10 PM |
Moonrise:01:13 PM Moonset: 04:08 AM Moon Phase ( Waxing Gibbous ) |
|
| 28 March 2026 Saturday |  Sunny |
-9.6 ° C (14.7°F) |
0.2 ° C (32.4°F) |
-5.5 ° C (22.1°F) |
% 47 | 0% | 2 | Sunrise:06:37 AM Sunset: 07:11 PM |
Moonrise:02:29 PM Moonset: 04:40 AM Moon Phase ( Waxing Gibbous ) |
|
| 29 March 2026 Sunday | Overcast |
-4.1 ° C (24.5°F) |
4.9 ° C (40.7°F) |
-0.6 ° C (31°F) |
% 54 | 0% | 1 | Sunrise:06:35 AM Sunset: 07:12 PM |
Moonrise:03:43 PM Moonset: 05:06 AM Moon Phase ( Waxing Gibbous ) |
|
| 30 March 2026 Monday | Sunny |
-5.3 ° C (22.5°F) |
6.1 ° C (42.9°F) |
-0.3 ° C (31.5°F) |
% 60 | 0% | 2 | Sunrise:06:33 AM Sunset: 07:13 PM |
Moonrise:04:53 PM Moonset: 05:28 AM Moon Phase ( Waxing Gibbous ) |
|
| 31 March 2026 Tuesday |  Moderate snow |
-4.1 ° C (24.6°F) |
2.5 ° C (36.6°F) |
0.1 ° C (32.1°F) |
% 91 | 89% | 1 | Sunrise:06:32 AM Sunset: 07:14 PM |
Moonrise:06:02 PM Moonset: 05:48 AM Moon Phase ( Waxing Gibbous ) |
|
| 01 April 2026 Wednesday | Patchy rain nearby |
-0.8 ° C (30.5°F) |
3.6 ° C (38.4°F) |
1.2 ° C (34.2°F) |
% 97 | 88% | 1 | Sunrise:06:30 AM Sunset: 07:16 PM |
Moonrise:07:09 PM Moonset: 06:06 AM Moon Phase ( Waxing Gibbous ) |
|
| 02 April 2026 Thursday | Partly Cloudy |
-7.4 ° C (18.6°F) |
-2.5 ° C (27.4°F) |
-4.8 ° C (23.3°F) |
% 66 | 0% | 2 | Sunrise:06:28 AM Sunset: 07:17 PM |
Moonrise:08:16 PM Moonset: 06:24 AM Moon Phase ( Full Moon ) |
|
| 03 April 2026 Friday | Partly Cloudy |
-8.6 ° C (16.6°F) |
4.2 ° C (39.6°F) |
-2.8 ° C (27°F) |
% 58 | 0% | 2 | Sunrise:06:26 AM Sunset: 07:18 PM |
Moonrise:09:23 PM Moonset: 06:44 AM Moon Phase ( Waning Gibbous ) |
|
| 04 April 2026 Saturday | Patchy rain nearby |
-5.1 ° C (22.9°F) |
6.6 ° C (44°F) |
0.7 ° C (33.2°F) |
% 67 | 85% | 1 | Sunrise:06:24 AM Sunset: 07:19 PM |
Moonrise:10:30 PM Moonset: 07:08 AM Moon Phase ( Waning Gibbous ) |
|
| 05 April 2026 Sunday | Patchy rain nearby |
0.6 ° C (33.1°F) |
9.9 ° C (49.8°F) |
6.7 ° C (44.1°F) |
% 94 | 83% | 2 | Sunrise:06:23 AM Sunset: 07:20 PM |
Moonrise:11:36 PM Moonset: 07:35 AM Moon Phase ( Waning Gibbous ) |
|
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