Lhasa climate information
The table below displays average monthly climate indicators in LHASA based on 8 years of historical weather readings.  
Temperature by: 
Fahrenheit / Centigrade
 
LHASA
 29 66 N, 91 13 E, 11975 feet (3650 meters) above sea level. 
  
    
      | 
            
              |   | Jan  | Feb  | Mar  | Apr  | May  | Jun  | Jul  | Aug  | Sep  | Oct  | Nov  | Dec  |  
              | 
                  
                    
                      | 
 | Avg. Temperature |  | 310
 | 362
 | 425
 | 488
 | 5613
 | 6116
 | 6015
 | 5915
 | 5613
 | 499
 | 393
 | 320
 |  
              | 
                  
                    
                      | 
 | Avg. Max Temperature |  | 467
 | 488
 | 5412
 | 6015
 | 6920
 | 7322
 | 7222
 | 7021
 | 6820
 | 6317
 | 5512
 | 488
 |  
              | 
                  
                    
                      | 
 | Avg. Min Temperature
 |  | 17-8
 | 23-5
 | 29-1
 | 351
 | 436
 | 499
 | 5010
 | 499
 | 467
 | 372
 | 26-3
 | 19-7
 |  
              | 
                  
                    
                      | 
 | Avg. Rain Days |  | 0 | 0 | 0 | 3 | 6 | 11 | 12 | 14 | 10 | 3 | 0 | 0 |  
              | 
                  
                    
                      | 
 | Avg. Snow Days |  | 0 | 1 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |  | 
  
 
From http://www.climate-zone.com/. 
The weather forcast of other major cities in Tibet: