Grantham in May
6.7out of 10
Possible, with caveats
Mild: highs around 16°C. Frequent rain: about 11 rainy days.
16°CAvg high
8°CAvg low
11Rainy days (53 mm)
15:34 hDaylight
05:12Sunrise · 20:46 Sunset
Why this score
- Mild: highs around 16°C
- Frequent rain: about 11 rainy days
What to wear and pack
- Layers you can add or remove
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in May varies a lot between years (±3.6 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 7°C | 2°C | 48 mm | 11 | – | – | 5.1 |
| February | 8°C | 2°C | 39 mm | 10 | – | – | 5.5 |
| March | 10°C | 3°C | 44 mm | 10 | – | – | 5.8 |
| April | 13°C | 5°C | 51 mm | 11 | – | – | 6.1 |
| May | 16°C | 8°C | 53 mm | 11 | – | – | 6.7 |
| June | 19°C | 11°C | 64 mm | 11 | – | – | 7.1 |
| July | 21°C | 13°C | 63 mm | 11 | – | – | 7.5 |
| August | 21°C | 13°C | 65 mm | 11 | – | – | 7.5 |
| September | 18°C | 10°C | 54 mm | 9 | – | – | 7.2 |
| October | 14°C | 8°C | 60 mm | 11 | – | – | 6.4 |
| November | 10°C | 5°C | 56 mm | 11 | – | – | 5.7 |
| December | 7°C | 2°C | 53 mm | 11 | – | – | 5.2 |
Frequently asked questions
How hot is Grantham in May?
Daytime highs average 16°C and nights about 8°C.
When is the best time to visit Grantham?
The best months are July, August, September, June.