SME
Physical Geography · Problem type
Read a climograph
Use this for “A city’s coldest month is −8 °C and its warmest 23 °C, with rain every month. Name its Köppen climate.”
Record and look
Rain (mm)
20
20
35
55
85
100
95
85
70
45
35
25
Temperature (°C)
−8
−6
0
+8
+15
+20
+23
+21
+16
+9
+1
−5
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Temperature (°C)
−8
−6
0
+8
+15
+20
+23
+21
+16
+9
+1
−5
Rain (mm)
20
20
35
55
85
100
95
85
70
45
35
25
Temperature (°C)
Rain (mm)
Coldest month −8 °C, below 0 °C, warmest 23 °C, above 10 °C, rain all year: a D climate (Dfa).
Tap a bar at the height you want.
Assumptions
•
A climograph shows each month’s mean temperature and its total rain; the year’s pattern names the climate.
•
Dry (B) first: rain below 20 × mean temperature + 140 mm, or + 280 with 70 % of it in the warm half, or + 0 with 70 % in the cool half.
•
Then the coldest month gives A (18 °C or more), C (0–18 °C) or D (below 0 °C); a warmest month under 10 °C gives E.
•
Second letter: s for a dry summer, w for a dry winter, f for rain all year; third: a, b or c from the summer’s heat.
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