Click on a day for an hourly weather forecast
The weather in Mercer in July is hot. The average temperatures are between 21°C and 29°C.
You can expect rain for roughly half of the month of July in Mercer. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Mercer in July 2025.
If you’re planning to visit Mercer in the near future, we highly recommend that you review the 14 day weather forecast for Mercer before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 3° / -3° | 6 | 18 | 7 | 89 mm | Awful | Mercer in January |
| February | 5° / -2° | 7 | 14 | 7 | 117 mm | Awful | Mercer in February |
| March | 9° / 2° | 7 | 18 | 5 | 127 mm | Awful | Mercer in March |
| April | 15° / 7° | 6 | 24 | 1 | 105 mm | Good | Mercer in April |
| May | 21° / 12° | 7 | 24 | 0 | 130 mm | Ok | Mercer in May |
| June | 26° / 17° | 7 | 23 | 0 | 131 mm | Good | Mercer in June |
| July | 29° / 21° | 9 | 22 | 0 | 180 mm | Ok | Mercer in July |
| August | 28° / 20° | 7 | 24 | 0 | 174 mm | Good | Mercer in August |
| September | 25° / 17° | 5 | 25 | 0 | 111 mm | Perfect | Mercer in September |
| October | 18° / 11° | 5 | 25 | 0 | 134 mm | Good | Mercer in October |
| November | 11° / 5° | 5 | 24 | 1 | 91 mm | Ok | Mercer in November |
| December | 7° / 1° | 7 | 20 | 5 | 142 mm | Awful | Mercer in December |