Oacoma (SD) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Oacoma.
Climate overview of Oacoma
The climate in Oacoma, South Dakota, United States of America, is marked by large temperature swings across the seasons, ranging from 31°C (88°F) in July to 0°C (32°F) in January.
With around 591 mm (23 in) of annual rain/snowfall, the city has moderate precipitation levels. June is the wettest month and November the driest. It also has a distinct dry season from November to March, with very warm summers and very cold winters.
Oacoma Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Oacoma - and find the best time to visit.
Monthly Temperature in Oacoma
In Oacoma, temperatures differ significantly between summer and winter months. Typically, average maximum daytime temperatures range from a very warm 31°C (88°F) in July to a very cold 0°C (32°F) in the coolest month, January.
Nights vary from 18°C (64°F) in July to around -12°C (10°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Oacoma
On average, Oacoma receives a reasonable amount of rain/snowfall, with an annual precipitation of 591 mm (23 in). The climate in Oacoma shows significant variation throughout the year. Expect high rainfall in June, the wettest month, with an average of 110 mm (4.3 in) of precipitation over 12 rainy days.
In contrast, the driest month November offers drier and sunnier days, with around 11 mm (0.4 in) of snow/rainfall over 4 snowy/rainy days. For more details, please visit our Oacoma Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Oacoma
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May and September
- Warmest weather: July
- Fewest rainy days: January, February and November
- Wettest months: April, May, June, July and August, when rainfall is highest.
- Seasonal pattern: A distinct dry season from November to March, with very warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -12°C (10°F).
Frequently asked questions about the climate in Oacoma
What is the best time to visit Oacoma?
May and September typically offer the most optimal weather in Oacoma. In contrast, January, February and December tend to have less optimal conditions. Oacoma has a distinct dry season from November to March, with very warm summers and very cold winters.
What temperatures can I expect in Oacoma?
Daytime highs range from 0°C (32°F) in January to 31°C (88°F) in July. Nighttime lows range from -12°C (10°F) to 18°C (64°F). Temperatures vary considerably through the year.
How much rain does Oacoma get?
Annual rainfall is around 591 mm (23 in). June is the wettest month with 110 mm (4.3 in), while November is the driest with 11 mm (0.4 in).
Oacoma 3-Day Forecast
Oacoma on the map
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