Tehran's climate is characterized by large differences in temperature between summer and winter. It is not unusual for snow to fall in winter, making it a cold winter. Precipitation is low throughout the year.

Tehran Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Highest Temperature 8 11 16 22 28 33 36 35 31 24 15 10 Lowest Temperature -1 1 5 10 15 20 23 22 18 12 5 1 Precipitation 37 34 37 28 15 3 3 1 1 14 21 36 Precipitation number of days 5 4 5 6 3 1 0 0 0 2 4 5 　Singapore Highest Temperature 30 31 31 32 32 31 31 31 31 31 31 30 Lowest Temperature 23 24 24 24 25 25 24 24 24 24 24 23 Precipitation 198 154 171 141 158 140 145 143 177 167 252 304 Precipitation number of days 17 11 14 15 15 13 13 14 14 16 18 19

Iran 　Tehran 　Isfahan 　Shiraz 　Yazd	The time difference of Tehran is UTC+3.5 UTC+4.5 for daylight saving time Local time Daylight savings time UTC 0:00 1:00 20:30 1:00 2:00 21:30 2:00 3:00 22:30 3:00 4:00 23:30 4:00 5:00 0:30 5:00 6:00 1:30 6:00 7:00 2:30 7:00 8:00 3:30 8:00 9:00 4:30 9:00 10:00 5:30 10:00 11:00 6:30 11:00 12:00 7:30 12:00 13:00 8:30 13:00 14:00 9:30 14:00 15:00 10:30 15:00 16:00 11:30 16:00 17:00 12:30 17:00 18:00 13:30 18:00 19:00 14:30 19:00 20:00 15:30 20:00 21:00 16:30 21:00 22:00 17:30 22:00 23:00 18:30 23:00 0:00 19:30