Newcastle Weather Forecast 15 Days, Weather in Newcastle Today
Current weather conditions and 15 day weather forecast for Newcastle, Wyoming, 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 Newcastle
| 14 December 2025 Sunday -6.1 ° C / 21°F  Clear |
Feels Like : -10.3 ° C / 13.5°F Humidity : % 88 Pressure : 1022 mb Wind Speed : 9 kmph / 5.6 miles from ESE  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 0 |
15 day weather forecast for Newcastle, WY, USA
Weather Forecast for next 15 Days for Newcastle 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 Newcastle, Wyoming 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 December 2025 Saturday |  Patchy moderate snow |
-10.8 ° C (12.6°F) |
-2.1 ° C (28.2°F) |
-6.5 ° C (20.4°F) |
% 79 | 74% | 0.3 | Sunrise:07:23 AM Sunset: 04:20 PM |
Moonrise:01:16 AM Moonset: 12:42 PM Moon Phase ( Waning Crescent ) |
|
| 14 December 2025 Sunday | Sunny |
-11.8 ° C (10.8°F) |
6.7 ° C (44.1°F) |
-1.2 ° C (29.8°F) |
% 63 | 0% | 0.3 | Sunrise:07:24 AM Sunset: 04:20 PM |
Moonrise:02:19 AM Moonset: 01:01 PM Moon Phase ( Waning Crescent ) |
|
| 15 December 2025 Monday | Sunny |
-1.2 ° C (29.8°F) |
6 ° C (42.8°F) |
1.9 ° C (35.4°F) |
% 57 | 0% | 0.3 | Sunrise:07:25 AM Sunset: 04:20 PM |
Moonrise:03:24 AM Moonset: 01:22 PM Moon Phase ( Waning Crescent ) |
|
| 16 December 2025 Tuesday |  Overcast |
-0.8 ° C (30.5°F) |
5.2 ° C (41.4°F) |
1.6 ° C (34.9°F) |
% 68 | 0% | 0.2 | Sunrise:07:26 AM Sunset: 04:20 PM |
Moonrise:04:29 AM Moonset: 01:47 PM Moon Phase ( Waning Crescent ) |
|
| 17 December 2025 Wednesday |  Patchy rain nearby |
-0.5 ° C (31.1°F) |
10.9 ° C (51.7°F) |
2.8 ° C (37°F) |
% 56 | 86% | 0.1 | Sunrise:07:26 AM Sunset: 04:21 PM |
Moonrise:05:34 AM Moonset: 02:17 PM Moon Phase ( Waning Crescent ) |
|
| 18 December 2025 Thursday |  Partly Cloudy |
-1.9 ° C (28.6°F) |
2 ° C (35.6°F) |
-0.3 ° C (31.5°F) |
% 45 | 0% | 0 | Sunrise:07:27 AM Sunset: 04:21 PM |
Moonrise:06:37 AM Moonset: 02:55 PM Moon Phase ( Waning Crescent ) |
|
| 19 December 2025 Friday | Partly Cloudy |
1.1 ° C (34°F) |
11.4 ° C (52.6°F) |
6.6 ° C (43.9°F) |
% 59 | 0% | 3 | Sunrise:07:28 AM Sunset: 04:22 PM |
Moonrise:07:36 AM Moonset: 03:43 PM Moon Phase ( New Moon ) |
|
| 20 December 2025 Saturday |  Moderate or heavy snow showers |
-6 ° C (21.2°F) |
0.4 ° C (32.8°F) |
-2.2 ° C (28°F) |
% 76 | 76% | 1 | Sunrise:07:28 AM Sunset: 04:22 PM |
Moonrise:08:27 AM Moonset: 04:39 PM Moon Phase ( New Moon ) |
|
| 21 December 2025 Sunday | Sunny |
-6.9 ° C (19.5°F) |
1.2 ° C (34.2°F) |
-3.8 ° C (25.1°F) |
% 62 | 0% | 2 | Sunrise:07:29 AM Sunset: 04:22 PM |
Moonrise:09:09 AM Moonset: 05:44 PM Moon Phase ( Waxing Crescent ) |
|
| 22 December 2025 Monday | Sunny |
-2 ° C (28.4°F) |
8.7 ° C (47.6°F) |
2.5 ° C (36.5°F) |
% 51 | 0% | 2 | Sunrise:07:29 AM Sunset: 04:23 PM |
Moonrise:09:44 AM Moonset: 06:51 PM Moon Phase ( Waxing Crescent ) |
|
| 23 December 2025 Tuesday | Moderate or heavy snow showers |
-4.3 ° C (24.2°F) |
-0.8 ° C (30.6°F) |
-3.4 ° C (25.9°F) |
% 62 | 75% | 1 | Sunrise:07:30 AM Sunset: 04:24 PM |
Moonrise:10:11 AM Moonset: 08:01 PM Moon Phase ( Waxing Crescent ) |
|
| 24 December 2025 Wednesday | Partly Cloudy |
-8.5 ° C (16.8°F) |
-3.5 ° C (25.8°F) |
-6.4 ° C (20.5°F) |
% 83 | 0% | 2 | Sunrise:07:30 AM Sunset: 04:24 PM |
Moonrise:10:34 AM Moonset: 09:11 PM Moon Phase ( Waxing Crescent ) |
|
| 25 December 2025 Thursday |  Light freezing rain |
-5.4 ° C (22.2°F) |
2.2 ° C (35.9°F) |
-0.9 ° C (30.3°F) |
% 86 | 67% | 1 | Sunrise:07:30 AM Sunset: 04:25 PM |
Moonrise:10:55 AM Moonset: 10:20 PM Moon Phase ( Waxing Crescent ) |
|
| 26 December 2025 Friday | Patchy moderate snow |
-4.3 ° C (24.3°F) |
1.7 ° C (35°F) |
-0.3 ° C (31.5°F) |
% 90 | 61% | 1 | Sunrise:07:31 AM Sunset: 04:25 PM |
Moonrise:11:15 AM Moonset: 11:31 PM Moon Phase ( Waxing Crescent ) |
|
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