Click on a day for an hourly weather forecast
The temperatures in Lawrenceville in September are comfortable with low of 18°C and and high up to 29°C.
You can expect about 3 to 8 days of rain in Lawrenceville during the month of September. 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 Lawrenceville in September 2025.
If you’re planning to visit Lawrenceville in the near future, we highly recommend that you review the 14 day weather forecast for Lawrenceville before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 10° / 2° | 8 | 22 | 2 | 140 mm | Awful | Lawrenceville in January |
| February | 13° / 4° | 8 | 19 | 2 | 169 mm | Awful | Lawrenceville in February |
| March | 17° / 7° | 9 | 22 | 1 | 158 mm | Ok | Lawrenceville in March |
| April | 22° / 11° | 7 | 23 | 0 | 174 mm | Ok | Lawrenceville in April |
| May | 27° / 16° | 9 | 22 | 0 | 189 mm | Good | Lawrenceville in May |
| June | 31° / 20° | 8 | 22 | 0 | 169 mm | Ok | Lawrenceville in June |
| July | 33° / 21° | 10 | 21 | 0 | 207 mm | Ok | Lawrenceville in July |
| August | 32° / 21° | 9 | 22 | 0 | 217 mm | Ok | Lawrenceville in August |
| September | 29° / 18° | 5 | 25 | 0 | 158 mm | Good | Lawrenceville in September |
| October | 23° / 12° | 5 | 26 | 0 | 107 mm | Perfect | Lawrenceville in October |
| November | 16° / 7° | 5 | 25 | 0 | 127 mm | Good | Lawrenceville in November |
| December | 12° / 5° | 7 | 23 | 1 | 168 mm | Bad | Lawrenceville in December |