Upper Hartwell, Saturday, 8 August, 17:53
Overcast. Feels like 27°C. High 27°C, low 10°C.
Upper Hartwell, Sunday, 9 August
Mainly clear. High 32°C, low 14°C.
Upper Hartwell, Monday, 10 August
Overcast. High 26°C, low 12°C.
Upper Hartwell, Tuesday, 11 August
Clear sky. High 27°C, low 13°C.
Upper Hartwell, Wednesday, 12 August
Clear sky. High 32°C, low 14°C.
Upper Hartwell, Thursday, 13 August
Clear sky. High 37°C, low 17°C.
Upper Hartwell, Friday, 14 August
Overcast. High 32°C, low 18°C.
Upper Hartwell, Saturday, 15 August
Overcast. High 27°C, low 18°C.
Upper Hartwell, Sunday, 16 August
Overcast. High 28°C, low 17°C.
Upper Hartwell, Monday, 17 August
Light rain. High 23°C, low 15°C.
Upper Hartwell, Tuesday, 18 August
Partly cloudy. High 20°C, low 11°C.
Upper Hartwell, Wednesday, 19 August
Overcast. High 24°C, low 11°C.
Upper Hartwell, Thursday, 20 August
Light rain. High 23°C, low 15°C.
Upper Hartwell, Friday, 21 August
Partly cloudy. High 22°C, low 10°C.
Upper Hartwell, Saturday, 22 August
Light rain. High 21°C, low 12°C.
Upper Hartwell, Sunday, 23 August
Overcast. High 21°C, low 11°C.
The first 16 days come from weather models — highly reliable for the first 3–5 days, gradually less so after that. Days 17 to 30 for Upper Hartwell are built from climate averages over the last 60 years, so they show typical weather for those dates rather than a specific forecast.
We compare the forecast with the climate average for exactly the same calendar days, calculated from 60 years of observations. The difference shows how the coming month compares with a typical one.
These are real historical extremes recorded in Upper Hartwell since 1960: the highest and lowest temperature for each calendar date, with the year it happened.
The forecast portion refreshes every hour. The climate portion is based on long-term data and stays stable.