Oslo

	Norway
	59.95 ° N 10.72 ° E
	318 ft
	Cool temperate moist forest

Dfb

Mild continental humid climate

DClo

Temperate continental climate with mild summer with cold winter

Traditional Koppen classification: Dfb (Mild continental humid climate)

Official definition:

D – temperature of the warmest month is higher than or equal to 10 °C and temperature of the coldest month is less than or equal to -3 °C.
f – precipitation is relatively evenly distributed throughout the year.
b - temperature of each of the four warmest months is higher than 10°C, but the temperature of the warmest month is less than 22 °C

In general it can be said that the D climate type can only be found in the Northern Hemisphere, northwards from the C climate zones, closer to the North Pole. The average temperature during the warmest month is higher than or equal to 10 °C, but in the winter the coldest month has an average value of less than -3 °C. In the winter it often snows and it tends to be quite windy and cold due to the polar and Arctic air masses.

Just like the Dfa type, precipitation is evenly distributed throughout the year. In comparison to the Dfa however, summer is slightly colder and the warmest month does not have average temperature above 22 °C. The highest summer temperatures are still usually between 30 and 35 °C, in the winter it drops to -10 to -35 °C.

Precipitation is higher in the summer, but the difference is not very large. Most of the precipitation in the summer occurs during thunderstorms and so quite often there are longer dry periods between them.

This Dfb category includes for example parts of Northern U.S. (for example Buffalo or Calgary), Southern part of Canada (for example Ottawa), Southern part of Russia (for example Vladivostok), Western part of Central Europe or Southern part of Scandinavia (for example Helsinki).

Modern Trewartha classification: DClo (Temperate continental climate with mild summer with cold winter)

In the Trewartha classification, the category D is like in the Koppen classification, assigned to regions in the temperate zone. The criterion for this type of climate is four to seven months with average temperature of more than 10 °C. In general it is further subdivided into two subtypes: oceanic and continental. These differ in their average temperature of the coldest month.

Temperate climate is characterized by four distinct seasons and there are substantial differences between the temperatures in the summer and in the winter, but the absolute values are not so extreme and the change is gradual.

The continental subtype is typical for regions located more inland and this also means the temperature variation is larger than that in case of the oceanic subtype. The coldest month has an average temperature of less than 0 °C. Summers are usually warmer, while winters colder with snow being quite common.

Continental D climate type can be found for example in parts of Northeast U.S., Central and Eastern Europe and usually these areas are quite densely inhabited.

mild summer: warmest month with average temperature between 10 and 18 °C
cold winter: coldest month with average temperature between -10 and 0 °C

Summary

42 °F
37 / 50

30.0 in
160 days

73 %

4 h 28 min/day

Temperature

	Month												Average
	1	2	3	4	5	6	7	8	9	10	11	12	Average
Min Temperature(°F)	19.0	19.0	25.0	34.0	43.0	50.0	55.0	54.0	46.0	37.0	30.0	25.0	37.0
Avg Temperature(°F)	24.0	25.0	32.0	40.0	51.0	59.0	62.0	59.0	51.0	43.0	33.0	26.0	42.0
Max Temperature (°F)	28.0	30.0	39.0	50.0	61.0	68.0	72.0	70.0	61.0	48.0	37.0	32.0	50.0
Range	9.0	11.0	14.0	16.0	18.0	18.0	17.0	16.0	15.0	11.0	7.0	7.0	13.0

	Max month	Min month	Annual range
Min Temperature	Jul	Jan, Feb	36.0°F
Avg Temperature	Jul	Jan	38.0°F
Max Temperature	Jul	Jan	44.0°F
Temperature range	May, Jun	Nov, Dec	53.0°F

													Average
	1	2	3	4	5	6	7	8	9	10	11	12	Average
Min Temperature(°F)
Avg Temperature(°F)
Max Temperature(°F)

	Mar, Apr, May				Jun, Jul, Aug				Sep, Oct, Nov				Dec, Jan, Feb
	Max	Min	Average	Range	Max	Min	Average	Range	Max	Min	Average	Range	Max	Min	Average	Range
Min Temperature	43.0	25.0	34.00	18.0	55.0	50.0	53.00	5.0	46.0	30.0	37.67	16.0	25.0	19.0	21.00	6.0
Avg Temperature	51.0	32.0	41.00	19.0	62.0	59.0	60.00	3.0	51.0	33.0	42.33	18.0	26.0	24.0	25.00	2.0
Max Temperature	61.0	39.0	50.00	22.0	72.0	68.0	70.00	4.0	61.0	37.0	48.67	24.0	32.0	28.0	30.00	4.0

Temperature

	Month												Average
	1	2	3	4	5	6	7	8	9	10	11	12	Average
Avg Temperature (°F)	24.0	25.0	32.0	40.0	51.0	59.0	62.0	59.0	51.0	43.0	33.0	26.0	42.0

	Max month	Min month	Annual range
Avg Temperature	Jul	Jan	38.0°F

	Month												Average
	1	2	3	4	5	6	7	8	9	10	11	12	Average
Avg Temperature (°F)

	Mar, Apr, May				Jun, Jul, Aug				Sep, Oct, Nov				Dec, Jan, Feb
	Max	Min	Average	Range	Max	Min	Average	Range	Max	Min	Average	Range	Max	Min	Average	Range
Avg Temperature	51.0	32.0	41.00	19.0	62.0	59.0	60.00	3.0	51.0	33.0	42.33	18.0	26.0	24.0	25.00	2.0

Humidity

	Month												Average
	1	2	3	4	5	6	7	8	9	10	11	12	Average
Avg Humidity (%)	81.0	78.0	72.0	65.0	64.0	65.0	67.0	72.0	76.0	80.0	80.0	81.0	42.0

	Max month	Min month	Annual range
Avg Humidity	Jan, Dec	May	17.0%

	Month												Average
	1	2	3	4	5	6	7	8	9	10	11	12	Average
Avg Humidity (%)

	Mar, Apr, May				Jun, Jul, Aug				Sep, Oct, Nov				Dec, Jan, Feb
	Max	Min	Average	Range	Max	Min	Average	Range	Max	Min	Average	Range	Max	Min	Average	Range
Avg Humidity	72.0	64.0	67.00	8.0	72.0	65.0	68.00	7.0	80.0	76.0	78.67	4.0	81.0	78.0	80.00	3.0

Precipitation

	Month												Monthly average	Annual total
	1	2	3	4	5	6	7	8	9	10	11	12	Monthly average	Annual total
Average monthly precipitation (in)	1.9	1.4	1.9	1.6	2.1	2.6	3.2	3.5	3.5	3.3	2.9	2.2	2.5	30.0
Wetdays	15	12	9	11	10	13	15	14	14	14	16	17	13	160
Wetdays ratio (%)	48.4 15,16	42.9 12,16	29.0 9,22	36.7 11,19	32.3 10,21	43.3 13,17	48.4 15,16	45.2 14,17	46.7 14,16	45.2 14,17	53.3 16,14	54.8 17,14	43.8 43.8356,56.1644

	Max month	Min month	Max Season	Min Season	Annual range
Average monthly precipitation	Sep	Feb	Autumn	Winter	2.1in
Wetdays	Dec	Mar	Autumn	Spring	8

	Month
	1	2	3	4	5	6	7	8	9	10	11	12
Average monthly precipitation (in)
Wetdays / month

	Mar, Apr, May				Jun, Jul, Aug				Sep, Oct, Nov				Dec, Jan, Feb
	Max	Min	Range	Total	Max	Min	Range	Total	Max	Min	Range	Total	Max	Min	Range	Total
Average monthly precipitation (in)	2.1	1.6	0.5	5.6	3.5	2.6	0.9	9.3	3.5	2.9	0.7	9.7	2.2	1.4	0.8	5.5
Wetdays	11	9	2	30	15	13	2	42	43	14	29	90	17	12	5	44

Precipitation

	Month												Monthly average	Annual total
	1	2	3	4	5	6	7	8	9	10	11	12	Monthly average	Annual total
Average monthly precipitation (in)	1.9	1.4	1.9	1.6	2.1	2.6	3.2	3.5	3.5	3.3	2.9	2.2	2.5	30.0

	Max month	Min month	Max Season	Min Season	Annual range
Average monthly precipitation	Sep	Feb	Autumn	Winter	2.1in

	Month
	1	2	3	4	5	6	7	8	9	10	11	12
Average monthly precipitation (in)

	Mar, Apr, May				Jun, Jul, Aug				Sep, Oct, Nov				Dec, Jan, Feb
	Max	Min	Range	Total	Max	Min	Range	Total	Max	Min	Range	Total	Max	Min	Range	Total
Average monthly precipitation (in)	2.1	1.6	0.5	5.6	3.5	2.6	0.9	9.3	3.5	2.9	0.7	9.7	2.2	1.4	0.8	5.5

Sunlight / Day length

			Max day length	Min day length	Sunlight/Day length
Jan	87 min 1 h 27 min	409 min 6 h 49 min 409,1031	472 min 7 h 52 min (31.1.) 472,968	361 min 6 h 1 min (1.1.) 361,1079	21.3 % 87,322
Feb	176 min 2 h 56 min	550 min 9 h 10 min 550,890	625 min 10 h 25 min (29.2.) 625,815	477 min 7 h 57 min (1.2.) 477,963	32.0 % 176,374
Mar	294 min 4 h 54 min	712 min 11 h 52 min 712,728	794 min 13 h 14 min (31.3.) 794,646	630 min 10 h 30 min (1.3.) 630,810	41.3 % 294,418
Apr	364 min 6 h 4 min	878 min 14 h 38 min 878,562	955 min 15 h 55 min (30.4.) 955,485	799 min 13 h 19 min (1.4.) 799,641	41.5 % 364,514
May	450 min 7 h 30 min	1031 min 17 h 11 min 1031,409	1093 min 18 h 13 min (31.5.) 1093,347	960 min 16 h 0 min (1.5.) 960,480	43.6 % 450,581
Jun	488 min 8 h 8 min	1120 min 18 h 40 min 1120,320	1129 min 18 h 49 min (20.6.) 1129,311	1097 min 18 h 17 min (1.6.) 1097,343	43.6 % 488,632
Jul	423 min 7 h 3 min	1072 min 17 h 52 min 1072,368	1119 min 18 h 39 min (1.7.) 1119,321	1011 min 16 h 51 min (31.7.) 1011,429	39.5 % 423,649
Aug	354 min 5 h 54 min	930 min 15 h 30 min 930,510	1006 min 16 h 46 min (1.8.) 1006,434	851 min 14 h 11 min (31.8.) 851,589	38.1 % 354,576
Sep	276 min 4 h 36 min	768 min 12 h 48 min 768,672	846 min 14 h 6 min (1.9.) 846,594	690 min 11 h 30 min (30.9.) 690,750	35.9 % 276,492
Oct	168 min 2 h 48 min	604 min 10 h 4 min 604,836	684 min 11 h 24 min (1.10.) 684,756	524 min 8 h 44 min (31.10.) 524,916	27.8 % 168,436
Nov	82 min 1 h 22 min	450 min 7 h 30 min 450,990	519 min 8 h 39 min (1.11.) 519,921	389 min 6 h 29 min (30.11.) 389,1051	18.2 % 82,368
Dec	48 min 0 h 48 min	361 min 6 h 1 min 361,1079	386 min 6 h 26 min (1.12.) 386,1054	352 min 5 h 52 min (21.12.) 352,1088	13.3 % 48,313
Year	290 min 4 h 50 min	741 min 12 h 21 min 741,699	1129 min 18 h 49 min (19. 6.) 1129,311	352 min 5 h 52 min (20. 12.) 352,1088	39.1 % 290,451

	Mar, Apr, May				Jun, Jul, Aug				Sep, Oct, Nov				Dec, Jan, Feb
	Max	Min	Average	Sunlight/day	Max	Min	Average	Sunlight/day	Max	Min	Average	Sunlight/day	Max	Min	Average	Sunlight/day
(min/day)	450	294	369	42.3% 369,504	488	354	422	40.6% 422,618	276	82	175	28.9% 175,432	176	48	104	23.7% 104,334
Day length	1093	630	874	42.3% 369,504	1129	851	1040	40.6% 422,618	846	389	607	28.9% 175,432	625	352	437	23.7% 104,334

Day length

		Max day length	Min day length
Jan	409 min 6 h 49 min 409,1031	472 min 7 h 52 min (Array.1.) 472,968	361 min 6 h 1 min (1.1.) 361,1079
Feb	550 min 9 h 10 min 550,890	625 min 10 h 25 min (Array.2.) 625,815	477 min 7 h 57 min (1.2.) 477,963
Mar	712 min 11 h 52 min 712,728	794 min 13 h 14 min (Array.3.) 794,646	630 min 10 h 30 min (1.3.) 630,810
Apr	878 min 14 h 38 min 878,562	955 min 15 h 55 min (Array.4.) 955,485	799 min 13 h 19 min (1.4.) 799,641
May	1031 min 17 h 11 min 1031,409	1093 min 18 h 13 min (Array.5.) 1093,347	960 min 16 h 0 min (1.5.) 960,480
Jun	1120 min 18 h 40 min 1120,320	1129 min 18 h 49 min (Array.6.) 1129,311	1097 min 18 h 17 min (1.6.) 1097,343
Jul	1072 min 17 h 52 min 1072,368	1119 min 18 h 39 min (Array.7.) 1119,321	1011 min 16 h 51 min (31.7.) 1011,429
Aug	930 min 15 h 30 min 930,510	1006 min 16 h 46 min (Array.8.) 1006,434	851 min 14 h 11 min (31.8.) 851,589
Sep	768 min 12 h 48 min 768,672	846 min 14 h 6 min (Array.9.) 846,594	690 min 11 h 30 min (30.9.) 690,750
Oct	604 min 10 h 4 min 604,836	684 min 11 h 24 min (Array.10.) 684,756	524 min 8 h 44 min (31.10.) 524,916
Nov	450 min 7 h 30 min 450,990	519 min 8 h 39 min (Array.11.) 519,921	389 min 6 h 29 min (30.11.) 389,1051
Dec	361 min 6 h 1 min 361,1079	386 min 6 h 26 min (Array.12.) 386,1054	352 min 5 h 52 min (21.12.) 352,1088
Year	741 min 12 h 21 min 741,699	1129 min 18 h 49 min (21. 6.) 1129,311	352 min 5 h 52 min (22. 12.) 352,1088

	Mar, Apr, May			Jun, Jul, Aug			Sep, Oct, Nov			Dec, Jan, Feb
	Max	Min	Average	Max	Min	Average	Max	Min	Average	Max	Min	Average
Day length	1093	630	874	1129	851	1040	846	389	607	625	352	437

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