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Niigata Climate Guide
Japan
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Maximum Daytime Temperature (°C)
Minimum Night-time Temperature (°C)
5
5 °C (41°F) Maximum Daytime Temperature in January
5
5 °C (41°F) Maximum Daytime Temperature in February
9
9 °C (48°F) Maximum Daytime Temperature in March
16
16 °C (61°F) Maximum Daytime Temperature in April
21
21 °C (70°F) Maximum Daytime Temperature in May
24
24 °C (75°F) Maximum Daytime Temperature in June
29
29 °C (84°F) Maximum Daytime Temperature in July
31
31 °C (88°F) Maximum Daytime Temperature in August
26
26 °C (79°F) Maximum Daytime Temperature in September
20
20 °C (68°F) Maximum Daytime Temperature in October
14
14 °C (57°F) Maximum Daytime Temperature in November
8
8 °C (46°F) Maximum Daytime Temperature in December
J F M A M J J A S O N D
1
1 °C (34°F) Minimum Night-time Temperature in March
7
7 °C (45°F) Minimum Night-time Temperature in April
12
12 °C (54°F) Minimum Night-time Temperature in May
17
17 °C (63°F) Minimum Night-time Temperature in June
21
21 °C (70°F) Minimum Night-time Temperature in July
23
23 °C (73°F) Minimum Night-time Temperature in August
18
18 °C (64°F) Minimum Night-time Temperature in September
12
12 °C (54°F) Minimum Night-time Temperature in October
6
6 °C (43°F) Minimum Night-time Temperature in November
2
2 °C (36°F) Minimum Night-time Temperature in December
J F M A M J J A S O N D
-1 °C (30°F) Minimum Night-time Temperature in January
-1
-1 °C (30°F) Minimum Night-time Temperature in February
-1
Hours of Sunshine
Hours of Daylight
2
2 Hours of Sunshine (20% of Daylight Hours) in January
3
3 Hours of Sunshine (28% of Daylight Hours) in February
5
5 Hours of Sunshine (39% of Daylight Hours) in March
6
6 Hours of Sunshine (46% of Daylight Hours) in April
7
7 Hours of Sunshine (47% of Daylight Hours) in May
6
6 Hours of Sunshine (37% of Daylight Hours) in June
5
5 Hours of Sunshine (37% of Daylight Hours) in July
7
7 Hours of Sunshine (48% of Daylight Hours) in August
5
5 Hours of Sunshine (37% of Daylight Hours) in September
5
5 Hours of Sunshine (41% of Daylight Hours) in October
3
3 Hours of Sunshine (31% of Daylight Hours) in November
2
2 Hours of Sunshine (22% of Daylight Hours) in December
J F M A M J J A S O N D
10
10 Hours of Daylight in January
11
11 Hours of Daylight in February
12
12 Hours of Daylight in March
13
13 Hours of Daylight in April
14
14 Hours of Daylight in May
15
15 Hours of Daylight in June
15
15 Hours of Daylight in July
14
14 Hours of Daylight in August
12
12 Hours of Daylight in September
11
11 Hours of Daylight in October
10
10 Hours of Daylight in November
10
10 Hours of Daylight in December
J F M A M J J A S O N D
Days with some Rain
Monthly Rainfall (mm)
29
29 Days with some Rain in January
26
26 Days with some Rain in February
25
25 Days with some Rain in March
18
18 Days with some Rain in April
17
17 Days with some Rain in May
18
18 Days with some Rain in June
19
19 Days with some Rain in July
18
18 Days with some Rain in August
20
20 Days with some Rain in September
20
20 Days with some Rain in October
23
23 Days with some Rain in November
28
28 Days with some Rain in December
J F M A M J J A S O N D
188
188 mm (7.4 inches) Monthly Rainfall in January
128
128 mm (5.0 inches) Monthly Rainfall in February
102
102 mm (4.0 inches) Monthly Rainfall in March
92
92 mm (3.6 inches) Monthly Rainfall in April
97
97 mm (3.8 inches) Monthly Rainfall in May
117
117 mm (4.6 inches) Monthly Rainfall in June
181
181 mm (7.1 inches) Monthly Rainfall in July
135
135 mm (5.3 inches) Monthly Rainfall in August
158
158 mm (6.2 inches) Monthly Rainfall in September
155
155 mm (6.1 inches) Monthly Rainfall in October
194
194 mm (7.6 inches) Monthly Rainfall in November
216
216 mm (8.5 inches) Monthly Rainfall in December
J F M A M J J A S O N D
Heat & Humidity / Chance of Frost
UV Index (Maximum)
20
20 Days with Frost in January
18
18 Days with Frost in February
16
16 Days with Frost in March
5
5 Days with Frost in April
-
No Heat & Humidity or Frost in May
-
No Heat & Humidity or Frost in June
M
Moderate Heat & Humidity in July
H
High Heat & Humidity in August
L
Low Heat & Humidity in September
-
No Heat & Humidity or Frost in October
6
6 Days with Frost in November
15
15 Days with Frost in December
J F M A M J J A S O N D
2
UV 2 (Low) in January
3
UV 3 (Moderate) in February
5
UV 5 (Moderate) in March
7
UV 7 (High) in April
8
UV 8 (Very High) in May
9
UV 9 (Very High) in June
10
UV 10 (Very High) in July
9
UV 9 (Very High) in August
7
UV 7 (High) in September
5
UV 5 (Moderate) in October
3
UV 3 (Moderate) in November
2
UV 2 (Low) in December
J F M A M J J A S O N D
Sea Temperature (°C)
11
11 °C (52°F) Sea Temperature in January
8
8 °C (46°F) Sea Temperature in February
8
8 °C (46°F) Sea Temperature in March
10
10 °C (50°F) Sea Temperature in April
13
13 °C (55°F) Sea Temperature in May
17
17 °C (63°F) Sea Temperature in June
21
21 °C (70°F) Sea Temperature in July
24
24 °C (75°F) Sea Temperature in August
23
23 °C (73°F) Sea Temperature in September
20
20 °C (68°F) Sea Temperature in October
17
17 °C (63°F) Sea Temperature in November
13
13 °C (55°F) Sea Temperature in December
J F M A M J J A S O N D
Niigata Climate Guide (Historical Weather Averages), Japan
Elev: 0 m   Long: 139°03'E   Lat: 37°55'N
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