Waltham Weather Forecast 15 Days, Weather in Waltham Today
Current weather conditions and 15 day weather forecast for Waltham, Massachusetts, 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 Waltham
| 13 May 2026 Wednesday 18.9 ° C / 66°F  Sunny |
Feels Like : 18.9 ° C / 66°F Humidity : % 47 Pressure : 1014 mb Wind Speed : 20.5 kmph / 12.8 miles from SSW  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 0 |
15 day weather forecast for Waltham, MA, USA
Weather Forecast for next 15 Days for Waltham 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 Waltham, Massachusetts 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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 13 May 2026 Wednesday | Sunny |
6.9 ° C (44.4°F) |
23.3 ° C (73.9°F) |
14.4 ° C (57.8°F) |
% 53 | 0% | 4.7 | Sunrise:05:26 AM Sunset: 07:58 PM |
Moonrise:03:19 AM Moonset: 04:24 PM Moon Phase ( Waning Crescent ) |
|
| 14 May 2026 Thursday |  Heavy rain |
11.2 ° C (52.1°F) |
17.1 ° C (62.7°F) |
13.1 ° C (55.6°F) |
% 89 | 89% | 4.1 | Sunrise:05:25 AM Sunset: 07:59 PM |
Moonrise:03:42 AM Moonset: 05:41 PM Moon Phase ( Waning Crescent ) |
|
| 15 May 2026 Friday |  Patchy rain nearby |
9.5 ° C (49.1°F) |
10.2 ° C (50.4°F) |
10.2 ° C (50.4°F) |
% 96 | 88% | 0.2 | Sunrise:05:24 AM Sunset: 08:00 PM |
Moonrise:04:09 AM Moonset: 07:03 PM Moon Phase ( Waning Crescent ) |
|
| 16 May 2026 Saturday | Sunny |
7 ° C (44.5°F) |
24.5 ° C (76°F) |
15.8 ° C (60.5°F) |
% 68 | 0% | 5 | Sunrise:05:23 AM Sunset: 08:01 PM |
Moonrise:04:42 AM Moonset: 08:26 PM Moon Phase ( New Moon ) |
|
| 17 May 2026 Sunday | Sunny |
13.6 ° C (56.5°F) |
27.3 ° C (81.1°F) |
19.9 ° C (67.8°F) |
% 58 | 0% | 5 | Sunrise:05:22 AM Sunset: 08:02 PM |
Moonrise:05:26 AM Moonset: 09:46 PM Moon Phase ( Waxing Crescent ) |
|
| 18 May 2026 Monday |  Partly Cloudy |
10.9 ° C (51.7°F) |
24.3 ° C (75.8°F) |
16.4 ° C (61.5°F) |
% 57 | 0% | 5 | Sunrise:05:21 AM Sunset: 08:03 PM |
Moonrise:06:22 AM Moonset: 10:56 PM Moon Phase ( Waxing Crescent ) |
|
| 19 May 2026 Tuesday | Sunny |
13.8 ° C (56.8°F) |
32.1 ° C (89.8°F) |
23 ° C (73.5°F) |
% 67 | 0% | 6 | Sunrise:05:20 AM Sunset: 08:04 PM |
Moonrise:07:31 AM Moonset: 11:52 PM Moon Phase ( Waxing Crescent ) |
|
| 20 May 2026 Wednesday | Partly Cloudy |
15.9 ° C (60.6°F) |
25.3 ° C (77.5°F) |
20.2 ° C (68.4°F) |
% 56 | 0% | 6 | Sunrise:05:19 AM Sunset: 08:05 PM |
Moonrise:08:47 AM Moonset: No moonset Moon Phase ( Waxing Crescent ) |
|
| 21 May 2026 Thursday | Partly Cloudy |
11.7 ° C (53°F) |
17.7 ° C (63.9°F) |
14.5 ° C (58.1°F) |
% 55 | 0% | 4 | Sunrise:05:18 AM Sunset: 08:06 PM |
Moonrise:10:06 AM Moonset: 12:34 AM Moon Phase ( Waxing Crescent ) |
|
| 22 May 2026 Friday | Partly Cloudy |
11.2 ° C (52.1°F) |
21.3 ° C (70.4°F) |
15.1 ° C (59.2°F) |
% 64 | 0% | 5 | Sunrise:05:17 AM Sunset: 08:07 PM |
Moonrise:11:22 AM Moonset: 01:06 AM Moon Phase ( Waxing Crescent ) |
|
| 23 May 2026 Saturday | Sunny |
9.2 ° C (48.6°F) |
23.2 ° C (73.7°F) |
16 ° C (60.8°F) |
% 51 | 0% | 5 | Sunrise:05:16 AM Sunset: 08:08 PM |
Moonrise:12:34 PM Moonset: 01:33 AM Moon Phase ( First Quarter ) |
|
| 24 May 2026 Sunday | Sunny |
10.2 ° C (50.3°F) |
26.7 ° C (80.1°F) |
18 ° C (64.4°F) |
% 54 | 0% | 5 | Sunrise:05:16 AM Sunset: 08:09 PM |
Moonrise:01:42 PM Moonset: 01:54 AM Moon Phase ( Waxing Gibbous ) |
|
| 25 May 2026 Monday | Sunny |
11.1 ° C (51.9°F) |
28 ° C (82.4°F) |
19.5 ° C (67.1°F) |
% 57 | 0% | 5 | Sunrise:05:15 AM Sunset: 08:09 PM |
Moonrise:02:48 PM Moonset: 02:14 AM Moon Phase ( Waxing Gibbous ) |
|
| 26 May 2026 Tuesday | Sunny |
16.2 ° C (61.2°F) |
32.3 ° C (90.1°F) |
23.9 ° C (75°F) |
% 61 | 0% | 6 | Sunrise:05:14 AM Sunset: 08:10 PM |
Moonrise:03:52 PM Moonset: 02:33 AM Moon Phase ( Waxing Gibbous ) |
|
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