Compare Belfast and Washington Weather

Belfast is 7127.4 kilometers (4428.8 miles) away and 8.0 hours ahead of Washington, United States. Belfast's climate is classified as Marine west coast, warm summer (Köppen climate classification: Cfb) while Washington has a Humid continental, dry warm summer climate (Dsb).

Belfast generally has warmer weather than Washington. The average mean temperature in Belfast is 9.88°C (49.78°F) while Washington’s temperature is 7.46°C (45.43°F) and the difference is 2.42°C (36.36°F). Belfast is warmest on average in July, when the day time temperature may reach 15.28°C (59.5°F), while Washington is warmest in July when the average high temperature is 20.46°C (68.83°F). Belfast is coldest in February when the average low temperature is 2.79°C (37.02°F), while January is the coldest month in Washington, when night time temperature often falls below -7.55°C (18.41°F).

Finally, Belfast has about 1.07 times more rainfall than Washington, (Belfast’s 60.02mm vs Washington’s average of 56.26mm).

Comparison summary

Weather	Belfast	Washington	Difference
Hottest month	July: 15.28°C (59.5°F)	July: 20.46°C (68.83°F)	5.18°C (41.32°F)
Coldest month	February: 2.79°C (37.02°F)	January: -7.55°C (18.41°F)	10.34°C (50.61°F)
Wettest month	August: 76.24mm (3.0in)	January: 103.96mm (4.09in)	27.72mm (1.09in)
Driest month	April: 43.42mm (1.71in)	July: 11.84mm (0.47in)	31.58mm (1.24in)

Contents [show]

Temperature
Precipitation
Number of days with rainfall
Wind Speed
Average Length of Day
Humidity
Comments

Temperature

Average Temperature ( °C )

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Belfast	5.12	5.28	6.46	8.83	11.48	14.03	15.28	14.86	13.18	10.62	7.67	5.77	9.88
Washington	-3.28	-1.97	1.45	5.86	12.13	15.48	20.46	20.39	14.87	7.24	0.33	-3.43	7.46

City Belfast

Jan5.12
Feb5.28
Mar6.46
Apr8.83
May11.48
Jun14.03
Jul15.28
Aug14.86
Sep13.18
Oct10.62
Nov7.67
Dec5.77
Yea9.88

City Washington

Jan-3.28
Feb-1.97
Mar1.45
Apr5.86
May12.13
Jun15.48
Jul20.46
Aug20.39
Sep14.87
Oct7.24
Nov0.33
Dec-3.43
Yea7.46

Average Temperature ( °F )

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Belfast	41.22	41.5	43.63	47.89	52.66	57.25	59.5	58.75	55.72	51.12	45.81	42.39	49.78
Washington	26.1	28.45	34.61	42.55	53.83	59.86	68.83	68.7	58.77	45.03	32.59	25.83	45.43

City Belfast

Jan41.22
Feb41.5
Mar43.63
Apr47.89
May52.66
Jun57.25
Jul59.5
Aug58.75
Sep55.72
Oct51.12
Nov45.81
Dec42.39
Yea49.78

City Washington

Jan26.1
Feb28.45
Mar34.61
Apr42.55
May53.83
Jun59.86
Jul68.83
Aug68.7
Sep58.77
Oct45.03
Nov32.59
Dec25.83
Yea45.43

Precipitation

Precipitation (mm)

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Belfast	50.67	58.25	55.34	43.42	46.37	75.11	66.09	76.24	51.12	73.75	62.16	61.75	60.02
Washington	103.96	80.54	70.43	43.42	42.86	27.12	11.84	14.32	33.6	66.35	79.36	101.33	56.26

City Belfast

Jan50.67
Feb58.25
Mar55.34
Apr43.42
May46.37
Jun75.11
Jul66.09
Aug76.24
Sep51.12
Oct73.75
Nov62.16
Dec61.75
Yea60.02

City Washington

Jan103.96
Feb80.54
Mar70.43
Apr43.42
May42.86
Jun27.12
Jul11.84
Aug14.32
Sep33.6
Oct66.35
Nov79.36
Dec101.33
Yea56.26

Precipitation (in)

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Belfast	1.99	2.29	2.18	1.71	1.83	2.96	2.6	3.0	2.01	2.9	2.45	2.43	2.36
Washington	4.09	3.17	2.77	1.71	1.69	1.07	0.47	0.56	1.32	2.61	3.12	3.99	2.21

City Belfast

Jan1.99
Feb2.29
Mar2.18
Apr1.71
May1.83
Jun2.96
Jul2.6
Aug3.0
Sep2.01
Oct2.9
Nov2.45
Dec2.43
Yea2.36

City Washington

Jan4.09
Feb3.17
Mar2.77
Apr1.71
May1.69
Jun1.07
Jul0.47
Aug0.56
Sep1.32
Oct2.61
Nov3.12
Dec3.99
Yea2.21

Number of days with rainfall

Average Number of Rainy Days ( Days )

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Belfast	12.0	10.82	10.91	9.0	10.82	14.09	14.36	15.18	10.91	11.73	11.36	12.18	11.95
Washington	15.73	14.91	16.45	12.18	10.73	6.36	3.64	3.45	7.36	11.27	14.27	14.55	10.91

City Belfast

Jan12.0
Feb10.82
Mar10.91
Apr9.0
May10.82
Jun14.09
Jul14.36
Aug15.18
Sep10.91
Oct11.73
Nov11.36
Dec12.18
Yea11.95

City Washington

Jan15.73
Feb14.91
Mar16.45
Apr12.18
May10.73
Jun6.36
Jul3.64
Aug3.45
Sep7.36
Oct11.27
Nov14.27
Dec14.55
Yea10.91

Wind Speed

Average Wind Speed ( km/h )

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Belfast	21.06	20.82	18.46	16.4	15.65	13.85	13.58	15.09	16.94	18.24	19.47	21.1	17.55
Washington	5.66	6.25	6.82	7.94	7.82	8.83	8.79	8.12	7.29	6.38	5.85	5.46	7.1

City Belfast

Jan21.06
Feb20.82
Mar18.46
Apr16.4
May15.65
Jun13.85
Jul13.58
Aug15.09
Sep16.94
Oct18.24
Nov19.47
Dec21.1
Yea17.55

City Washington

Jan5.66
Feb6.25
Mar6.82
Apr7.94
May7.82
Jun8.83
Jul8.79
Aug8.12
Sep7.29
Oct6.38
Nov5.85
Dec5.46
Yea7.1

Average Wind Speed ( mph )

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Belfast	13.09	12.94	11.47	10.19	9.72	8.61	8.44	9.38	10.53	11.33	12.1	13.11	10.91
Washington	3.52	3.88	4.24	4.93	4.86	5.49	5.46	5.05	4.53	3.96	3.64	3.39	4.41

City Belfast

Jan13.09
Feb12.94
Mar11.47
Apr10.19
May9.72
Jun8.61
Jul8.44
Aug9.38
Sep10.53
Oct11.33
Nov12.1
Dec13.11
Yea10.91

City Washington

Jan3.52
Feb3.88
Mar4.24
Apr4.93
May4.86
Jun5.49
Jul5.46
Aug5.05
Sep4.53
Oct3.96
Nov3.64
Dec3.39
Yea4.41

Average Length of Day ( Hours )

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Belfast	5.21	5.72	8.4	11.55	12.24	14.16	12.71	11.63	9.95	5.94	5.69	5.2	9.03
Washington	6.01	6.38	9.51	12.84	13.78	14.09	14.24	13.97	12.03	7.75	6.99	6.32	10.33

City Belfast

Jan5.21
Feb5.72
Mar8.4
Apr11.55
May12.24
Jun14.16
Jul12.71
Aug11.63
Sep9.95
Oct5.94
Nov5.69
Dec5.2
Yea9.03

City Washington

Jan6.01
Feb6.38
Mar9.51
Apr12.84
May13.78
Jun14.09
Jul14.24
Aug13.97
Sep12.03
Oct7.75
Nov6.99
Dec6.32
Yea10.33

Humidity (%)

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Belfast	87.52	86.05	84.01	82.76	82.71	85.12	86.63	87.13	86.74	86.69	86.65	87.79	85.82
Washington	91.9	90.06	86.15	76.64	69.56	65.75	56.87	56.52	63.88	74.21	83.56	90.45	75.46

City Belfast

Jan87.52
Feb86.05
Mar84.01
Apr82.76
May82.71
Jun85.12
Jul86.63
Aug87.13
Sep86.74
Oct86.69
Nov86.65
Dec87.79
Yea85.82

City Washington

Jan91.9
Feb90.06
Mar86.15
Apr76.64
May69.56
Jun65.75
Jul56.87
Aug56.52
Sep63.88
Oct74.21
Nov83.56
Dec90.45
Yea75.46

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