Newcastle (OK) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Newcastle.
Climate overview of Newcastle
Newcastle, Oklahoma, United States of America, experiences significant temperature variation throughout the year. Summers bring daytime highs of 34°C (93°F) in August, while winters cool to 10°C (50°F) in January.
The city receives around 953 mm (38 in) of rain/snowfall per year. It experiences a distinct dry season from January to February, with very warm summers and cold winters. May is the wettest month and January the driest. The most sunshine falls in August, with an average of 11.3 hours of daily sunshine.
Newcastle Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Newcastle - and find the best time to visit.
Monthly Temperature in Newcastle
Depending on the time of the year, temperatures range from very warm to chilly in Newcastle. On average, daytime temperatures range from a very warm 34°C (93°F) in August to a chilly 10°C (50°F) in January.
Nighttime temperatures range from 22°C (72°F) in August to -3°C (27°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Newcastle
Generally, Newcastle has a moderate amount of precipitation, averaging 953 mm (38 in) of rain/snowfall annually. The seasons in Newcastle bring significant changes in precipitation. The wettest month, May, receives heavy rainfall, with an average of 168 mm (6.6 in) of precipitation. This rainfall is distributed across 12 rainy days.
In contrast, the driest month, January, experiences much less rainfall, totaling 26 mm (1 in) over 4 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Newcastle Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Newcastle
In Newcastle, summer days are longer and more sunny, with daily sunshine hours peaking at 11.3 hours in August. As the darker season arrives, the brightness of the sun becomes less. January sees a soft sun for only 5.4 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Newcastle by Month
The relative humidity is moderate throughout the year in Newcastle.
The city experiences its highest humidity in January, reaching 62%. In August, the humidity drops to its lowest level at 48%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Newcastle
The mean wind speed over the year ranges from 5 m/s (10 knots) in July, August and September to 7 m/s (14 knots) in March and April. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Newcastle
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: October
- Warmest weather: July and August
- Most sunshine: June, July and August
- Fewest rainy days: January, February, November and December
- Wettest months: April, May, June, July and August, when rainfall is highest.
- Seasonal pattern: A distinct dry season from January to February, with very warm summers and cold winters
- Coldest conditions: January, with freezing nights around -3°C (27°F).
Frequently asked questions about the climate in Newcastle
What is the best time to visit Newcastle?
October typically offers the most optimal weather in Newcastle. In contrast, July and August tend to have less optimal conditions. Newcastle has a distinct dry season from January to February, with very warm summers and cold winters.
What temperatures can I expect in Newcastle?
Daytime highs range from 10°C (50°F) in January to 34°C (93°F) in August. Nighttime lows range from -3°C (27°F) to 22°C (72°F). Temperatures vary considerably through the year.
How much rain does Newcastle get?
Annual rainfall is around 953 mm (38 in). May is the wettest month with 168 mm (6.6 in), while January is the driest with 26 mm (1 in).
How sunny is Newcastle?
Newcastle receives around 3,026 hours of sunshine per year. August is the sunniest month with 338 hours, while January is the cloudiest with just 163 hours. Overall, Newcastle enjoys abundant sunshine.
Newcastle 3-Day Forecast
Newcastle on the map
Newcastle is highlighted - select any city to see its climate.
Popular this month
Where to go in August - average daytime high across popular destinations.
Kissimmee
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24°C (75°F) San Francisco22°C (72°F) 
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