Warmest month
- San Diego
- August · 21.76 °C
- Shanghai
- August · 28.29 °C
San Diego (USA) vs Shanghai (China): Temperature, Rainfall and Sunshine
Reference period: San Diego 2013–2023 · Shanghai 2013–2023
Across the 12 monthly averages, San Diego (USA) is warmer in 7 months and Shanghai (China) in 5; 0 months are equal at the displayed precision.
Key monthly differences
Coolest month
- San Diego
- January · 13.15 °C
- Shanghai
- January · 5.26 °C
Driest month
- San Diego
- June · 0.05 mm/day
- Shanghai
- December · 1.38 mm/day
Sunniest month
- San Diego
- July · 12.00 hours/day
- Shanghai
- August · 9.58 hours/day
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Climate comparison questions
When are the temperatures most similar and most different?
The smallest difference in monthly mean temperature is 0.34 °C (April); the largest is 7.89 °C (January).
How much do temperatures vary across the year?
The difference between the warmest and coolest monthly means is 8.61 °C in San Diego (USA) and 23.02 °C in Shanghai (China). This describes seasonal variation, not the range between daytime highs and nighttime lows.
Which location has more rainfall?
San Diego (USA) has a higher daily rainfall average in 2 months and Shanghai (China) in 10; 0 months are equal at the displayed precision. Rainfall amounts do not tell us how many days it rains.
Which location has more sunshine?
San Diego (USA) has more average sunshine hours per day in 12 months and Shanghai (China) in 0; 0 months are equal at the displayed precision. Sunshine duration is different from daylight duration.
Climate data notes
Show data and calculation
Daily values are averaged separately for each calendar month over the saved reference period. Temperatures are daily means, not daytime highs. Rainfall is an average daily amount, not a monthly total; sunshine is average hours per day. These historical averages are not a weather forecast. Each location’s reference period is listed below and may differ.
Mean of the 12 monthly averages
Monthly climate data
Difference: Shanghai (China) minus San Diego (USA)
Temperature °C
| Month | San Diego | Shanghai | +/- |
|---|---|---|---|
| Jan | 13.15 | 5.26 | −7.89 |
| Feb | 13.48 | 6.44 | −7.05 |
| Mar | 14.52 | 11.03 | −3.49 |
| Apr | 16.08 | 15.74 | −0.34 |
| May | 16.94 | 20.74 | +3.80 |
| Jun | 18.75 | 24.23 | +5.48 |
| Jul | 20.99 | 28.23 | +7.25 |
| Aug | 21.76 | 28.29 | +6.53 |
| Sep | 21.60 | 24.04 | +2.44 |
| Oct | 19.55 | 18.91 | −0.64 |
| Nov | 16.39 | 13.71 | −2.67 |
| Dec | 13.49 | 6.64 | −6.85 |
| Annual mean | 17.23 | 16.94 | −0.29 |
Average sunshine (hours/day)
| Month | San Diego | Shanghai | +/- |
|---|---|---|---|
| Jan | 8.21 | 5.82 | −2.38 |
| Feb | 9.25 | 5.73 | −3.52 |
| Mar | 9.97 | 6.75 | −3.22 |
| Apr | 10.93 | 7.97 | −2.96 |
| May | 11.13 | 7.64 | −3.49 |
| Jun | 11.84 | 6.55 | −5.30 |
| Jul | 12.00 | 8.73 | −3.27 |
| Aug | 11.44 | 9.58 | −1.85 |
| Sep | 10.58 | 7.71 | −2.87 |
| Oct | 9.70 | 7.16 | −2.53 |
| Nov | 8.87 | 6.10 | −2.77 |
| Dec | 7.88 | 6.33 | −1.54 |
| Annual mean | 10.15 | 7.17 | −2.97 |
Average daily rainfall (mm/day)
| Month | San Diego | Shanghai | +/- |
|---|---|---|---|
| Jan | 1.98 | 1.91 | −0.07 |
| Feb | 1.59 | 2.35 | +0.76 |
| Mar | 1.52 | 2.67 | +1.15 |
| Apr | 0.63 | 3.16 | +2.54 |
| May | 0.53 | 4.32 | +3.79 |
| Jun | 0.05 | 8.37 | +8.32 |
| Jul | 0.14 | 6.82 | +6.69 |
| Aug | 0.24 | 5.10 | +4.86 |
| Sep | 0.33 | 4.86 | +4.53 |
| Oct | 0.41 | 2.08 | +1.67 |
| Nov | 0.95 | 2.11 | +1.17 |
| Dec | 1.88 | 1.38 | −0.50 |
| Annual mean | 0.85 | 3.76 | +2.91 |
Snow (mm)
| Month | San Diego | Shanghai | +/- |
|---|---|---|---|
| Jan | 0.00 | 0.69 | +0.69 |
| Feb | 0.00 | 0.99 | +0.99 |
| Mar | 0.00 | 0.01 | +0.01 |
| Apr | 0.00 | 0.00 | 0.00 |
| May | 0.00 | 0.00 | 0.00 |
| Jun | 0.00 | 0.00 | 0.00 |
| Jul | 0.00 | 0.00 | 0.00 |
| Aug | 0.00 | 0.00 | 0.00 |
| Sep | 0.00 | 0.00 | 0.00 |
| Oct | 0.00 | 0.00 | 0.00 |
| Nov | 0.00 | 0.01 | +0.01 |
| Dec | 0.00 | 0.40 | +0.40 |
| Annual mean | 0.00 | 0.17 | +0.17 |
