Mellette, Aberdeen Weather
Mellette weather this week
Over the next 7 days in Mellette, daytime highs range from 6°C to 14°C and night-time lows from -5°C to 8°C. The warmest afternoon is likely on Wednesday at 14°C, while the coolest night is expected tonight at -5°C. Temperatures stay fairly steady through the week. Expect a wide gap of around 14°C between afternoon and early-morning temperatures, so mornings will feel noticeably cooler.
Rain is most likely Friday.
It turns breezy on Wednesday, with winds reaching about 36 km/h — secure loose objects on rooftops and balconies. UV levels stay moderate or lower, peaking at 3. Average humidity is a comfortable 72% or so.
| Day | Conditions | High / Low | Rain chance | Rain | Max wind |
|---|---|---|---|---|---|
| Today (Saturday) | Overcast | 8° / -5° | 0% | 0.0 mm | 29 km/h |
| Tomorrow (Sunday) | Clear sky | 11° / 1° | 1% | 0.0 mm | 29 km/h |
| Monday | Overcast | 13° / 2° | 1% | 0.0 mm | 23 km/h |
| Tuesday | Overcast | 13° / 8° | 1% | 0.0 mm | 34 km/h |
| Wednesday | Overcast | 14° / 7° | 18% | 0.0 mm | 36 km/h |
| Thursday | Overcast | 8° / 3° | 18% | 0.0 mm | 34 km/h |
| Friday | Overcast | 6° / 3° | 52% | 0.0 mm | 19 km/h |
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Today's outlook for Mellette
At 20:15 local time it is 4°C in Mellette under clear skies, feeling like -2°C. Today's forecast high is 8°C and the low is -5°C, and the day overall looks overcast. Rain is unlikely today (0% chance). Winds are blowing at about 21 km/h from the south. Humidity is 62%.
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Climate of Mellette: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), July is usually the hottest month in Mellette, with average daytime highs around 31°C. January is the coolest, when nights typically fall to about -14°C and frost is possible on the coldest nights. That is a wide yearly range of roughly 45°C, so the seasons feel very different from each other.
The area receives about 570 mm of rain in a typical year. Rainfall is modest in every month; June is the wettest at about 97 mm. The driest stretch is November to February, with under 20 mm a month.
For outdoor plans and travel, May to September usually offer the most comfortable weather in Mellette, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | -4° | -14° | 11 mm | 85% |
| Feb | -2° | -13° | 16 mm | 79% |
| Mar | 6° | -6° | 26 mm | 71% |
| Apr | 14° | 0° | 51 mm | 63% |
| May | 21° | 7° | 83 mm | 62% |
| Jun | 27° | 14° | 97 mm | 63% |
| Jul | 31° | 18° | 75 mm | 57% |
| Aug | 29° | 16° | 67 mm | 59% |
| Sep | 24° | 10° | 60 mm | 61% |
| Oct | 14° | 2° | 49 mm | 67% |
| Nov | 5° | -5° | 15 mm | 74% |
| Dec | -3° | -11° | 19 mm | 84% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Mellette. Values describe typical conditions, not a forecast.
About Mellette weather
Mellette is set in South Dakota's continental climate, with sharp seasonal extremes typical of the northern Great Plains, about 255 km north-west of Sioux Falls. Summers bring warm-to-hot summers (June–August) with highs in the high 20s to low 30s°C. The year winds down with cold, windy winters (December–February) with significant snow. This page shows live, auto-refreshing weather for Mellette: current conditions, an hourly breakdown, a 16-day outlook, a date-lookup tool for any past or future date, and real-time air quality, sourced from Open-Meteo. Local timezone: America/Chicago.
Frequently asked questions
Mellette is about 255 km north-west of Sioux Falls, in South Dakota.
Mellette sees cold, windy winters (December–February) with significant snow.
The live current conditions, hourly forecast and 16-day outlook above are pulled in real time for Mellette's exact coordinates. No fixed schedule, the page updates whenever you load it.
July is usually the hottest month in Mellette, with average daytime highs of about 31°C and nights around 18°C.
The coldest nights come in January, when the average low is about -14°C and daytime highs reach around -4°C. Frost is possible on clear, calm nights.
Mellette receives about 570 mm of rain in a typical year. June is the wettest month at roughly 97 mm; no month averages more than 100 mm.
May to September usually offer the most comfortable weather in Mellette, with mild daytime temperatures and little rain.
In November Mellette typically sees daytime highs near 5°C and lows near -5°C, with about 15 mm of rain over the month and average humidity around 74%. Check the live forecast above for this week's actual conditions.
Up to 16 days ahead using the extended forecast and date picker above; further-out or historical dates use the same date lookup tool.
Live temperature for Mellette is shown at the top of this page and refreshes automatically — see the hourly breakdown below for how it changes through the day.
Mellette's day-to-day weather follows the broader pattern of South Dakota described above. See the hourly weather forecast or the air quality index for more detail.