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Shanghai starts the year shivering in midwinter, when temperatures can drop below freezing and the vistas are grey and misty. Spring brings warmth; April to mid-May is probably one of the best times to visit weather-wise, along with autumn (late September to mid-November). In summer the hot and humid weather makes conditions outside uncomfortable, with temperatures sometimes as high as 40°C (104°F) in July and August. In short, you'll need silk long johns and down jackets for winter, an ice block for each armpit in summer and an umbrella wouldn't go astray in either of these seasons.
| Month | Temperature | Rainfall | Humidity | Hrs of sunshine | ||
| Min | Max | AM | PM | |||
| Jan | 1 | 8 | 48 | 87 | 58 | 4 |
| Feb | 1 | 8 | 58 | 89 | 60 | 4 |
| Mar | 4 | 13 | 84 | 89 | 53 | 4 |
| Apr | 10 | 19 | 94 | 91 | 58 | 5 |
| May | 15 | 25 | 94 | 92 | 56 | 5 |
| Jun | 19 | 28 | 180 | 94 | 66 | 5 |
| Jul | 23 | 32 | 147 | 93 | 66 | 7 |
| Aug | 23 | 32 | 142 | 94 | 65 | 7 |
| Sep | 19 | 28 | 130 | 94 | 64 | 5 |
| Oct | 14 | 23 | 71 | 92 | 53 | 6 |
| Nov | 7 | 17 | 51 | 90 | 55 | 5 |
| Dec | 2 | 12 | 36 | 89 | 62 | 5 |
