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The weather in Monmouth in August is hot. The average temperatures are between 22°C and 27°C.
You can expect about 3 to 8 days of rain in Monmouth during the month of August. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Monmouth in August 2025.
If you’re planning to visit Monmouth in the near future, we highly recommend that you review the 14 day weather forecast for Monmouth before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 3° / -2° | 5 | 19 | 6 | 50 mm | Awful | Monmouth in January |
| February | 4° / -1° | 5 | 18 | 6 | 64 mm | Awful | Monmouth in February |
| March | 8° / 3° | 5 | 22 | 4 | 68 mm | Bad | Monmouth in March |
| April | 13° / 8° | 5 | 25 | 0 | 59 mm | Ok | Monmouth in April |
| May | 18° / 13° | 6 | 25 | 0 | 83 mm | Good | Monmouth in May |
| June | 23° / 18° | 5 | 25 | 0 | 90 mm | Perfect | Monmouth in June |
| July | 27° / 22° | 7 | 24 | 0 | 119 mm | Good | Monmouth in July |
| August | 27° / 22° | 6 | 25 | 0 | 109 mm | Perfect | Monmouth in August |
| September | 24° / 19° | 4 | 26 | 0 | 82 mm | Perfect | Monmouth in September |
| October | 18° / 13° | 5 | 26 | 0 | 77 mm | Good | Monmouth in October |
| November | 12° / 7° | 4 | 25 | 1 | 48 mm | Ok | Monmouth in November |
| December | 7° / 3° | 5 | 22 | 4 | 77 mm | Bad | Monmouth in December |
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