Geography and Climate
The wide Dasht-e Gorgan (Plains of Gorgan) are located north of the city and geographically bounded by 37°00' - 37°30' north latitude and 54°00' - 54°30' east longitude, covering an area of about 1,700 square kilometres (660 sq mi).
In general, Golestan has a moderate and humid climate known as "the moderate Caspian climate." The effective factors behind such a climate are: Alborz mountain range, direction of the mountains, height of the area, neighborhood to the sea, vegetation surface, local winds, altitude and weather fronts. As a result of the above factors, three different climates exist in the region: plain moderate, mountainous, and semi-arid. Gorgan valley has a semi-arid climate. The average annual temperature is 18.2 °C (64.8 °F) and the annual rainfall is 600 millimetres (24 in).
| Climate data for Gorgan | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °C (°F) | 29 (84) |
32.4 (90.3) |
35 (95) |
39 (102) |
43 (109) |
45 (113) |
44 (111) |
44 (111) |
41.6 (106.9) |
39 (102) |
36 (97) |
29.2 (84.6) |
45 (113) |
| Average high °C (°F) | 12.4 (54.3) |
13.1 (55.6) |
15.3 (59.5) |
21.2 (70.2) |
26.9 (80.4) |
30.9 (87.6) |
32.6 (90.7) |
32.7 (90.9) |
29.9 (85.8) |
24.8 (76.6) |
18.8 (65.8) |
14.3 (57.7) |
22.74 (72.94) |
| Average low °C (°F) | 3.4 (38.1) |
3.8 (38.8) |
6.1 (43.0) |
10.7 (51.3) |
15.5 (59.9) |
19.9 (67.8) |
22.8 (73.0) |
22.9 (73.2) |
19.6 (67.3) |
13.9 (57.0) |
8.9 (48.0) |
5.2 (41.4) |
12.73 (54.91) |
| Record low °C (°F) | −10 (14) |
−6 (21) |
−3.2 (26.2) |
0 (32) |
2.8 (37.0) |
10 (50) |
15 (59) |
13 (55) |
9 (48) |
3 (37) |
−2 (28) |
−7 (19) |
−10 (14) |
| Precipitation mm (inches) | 55.0 (2.165) |
55.8 (2.197) |
79.4 (3.126) |
52.8 (2.079) |
44.1 (1.736) |
33.4 (1.315) |
22.2 (0.874) |
27.3 (1.075) |
38.9 (1.531) |
66.1 (2.602) |
68.5 (2.697) |
57.5 (2.264) |
601 (23.66) |
| % humidity | 73 | 73 | 74 | 72 | 67 | 64 | 65 | 68 | 69 | 70 | 73 | 74 | 70.2 |
| Avg. precipitation days (≥ 1.0 mm) | 7.4 | 8.0 | 10.5 | 8.0 | 6.1 | 4.2 | 3.7 | 4.2 | 5.2 | 5.7 | 6.7 | 6.8 | 76.5 |
| Mean monthly sunshine hours | 135.3 | 128.1 | 132.3 | 164.6 | 207.6 | 220.4 | 221.9 | 220.5 | 196.3 | 196.4 | 151.1 | 132.8 | 2,107.3 |
| Source: Synoptic Stations Statistics | |||||||||||||
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