COMPARE CITIES (Beta)

Cancun and Dulles are 1,349.4 miles away from each other. Dulles and Cancun are currently on the same timezone (GMT-5). Cancun has a tropical savanna climate (Köppen climate classification: Aw) while Dulles has a humid subtropical climate (Köppen climate classification: Cfa).

Cancun is much warmer than than Dulles. On average, Cancun is 81.1°F while Dulles is 55.3°F, a difference of 25.8°F. Cancun is warmest on average in August, when the average high temperature is 90.0°F, while Dulles is warmest in July, when the average high temperature is 90.0°F. Cancun and Dulles both are coolest in January, when the average low temperature is 67.8°F in Cancun and 23.9°F in Dulles.

Cancun has more precipitation than Dulles. On average, Cancun has 51.2 in. of precipitation while Dulles has 41.5 in., a difference of 9.7 inches.

Use the menu below to compare and chart different weather types for Cancun and Dulles.

°F | °C

Average Dew Point ( °F )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	68.0	68.0	69.0	71.0	73.0	76.0	76.0	76.0	75.0	73.0	71.0	69.0	72.0
Dulles	22.2	24.2	30.3	40.3	51.8	61.5	65.3	64.1	57.6	45.9	35.2	26.5	43.9

Average Evening Relative Humidity ( % )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	75.0	73.0	72.0	69.0	71.0	73.0	70.0	70.0	75.0	74.0	75.0	75.0	73.0
Dulles	57.0	52.0	49.0	46.0	53.0	54.0	54.0	55.0	55.0	52.0	54.0	57.0	53.0

Average Morning Relative Humidity ( % )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	86.0	85.0	85.0	84.0	83.0	84.0	84.0	86.0	85.0	86.0	86.0	86.0	85.0
Dulles	77.0	77.0	78.0	77.0	82.0	84.0	86.0	89.0	89.0	88.0	82.0	78.0	82.0

Average Precipitation ( in )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	4.1	2.0	1.8	1.1	3.5	5.6	2.7	3.4	7.2	11.1	5.0	3.5	51.2
Dulles	2.7	2.7	3.4	3.5	4.6	4.0	3.7	3.5	3.9	3.3	3.4	3.0	41.5

Average Number of Rainy Days ( Days )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	9.5	5.6	5.1	3.9	6.7	11.0	8.9	9.4	13.6	16.8	11.3	10.1	111.9
Dulles	10.0	9.0	10.0	10.0	12.0	10.0	11.0	10.0	9.0	8.0	9.0	10.0	117.0

Average High Temperature ( °F )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	81.0	82.0	84.0	85.0	88.0	89.0	90.0	90.0	89.0	87.0	84.0	82.0	86.0
Dulles	42.5	46.4	55.5	66.7	75.1	83.8	87.9	86.6	79.4	68.2	57.5	46.0	66.4

Average Low Temperature ( °F )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	67.8	68.7	70.2	72.9	75.2	76.5	76.6	76.3	75.7	74.1	71.6	69.3	72.9
Dulles	23.9	26.0	32.9	42.1	51.2	61.0	65.5	64.2	56.3	43.8	35.3	27.1	44.2

Average Number of Days Above 90F/32C ( Days )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun			1.0	3.0	10.0	17.0	24.0	25.0	17.0	7.0	1.0		105.0
Dulles				0.3	1.1	5.6	11.6	8.9	2.7	0.1			30.3

Average Temperature ( °F )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	75.4	77.0	78.8	81.3	83.8	84.6	85.3	85.5	84.2	81.7	78.8	76.5	81.1
Dulles	33.2	36.2	44.2	54.4	63.2	72.4	76.7	75.4	67.9	56.0	46.4	36.6	55.3

Highest Recorded Temperature ( °F )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	95.0	90.0	91.0	97.0	99.0	102.0	102.0	100.0	102.0	102.0	99.0	88.0	102.0
Dulles	75.0	79.0	89.0	93.0	97.0	102.0	105.0	104.0	99.0	94.0	84.0	79.0	105.0

Lowest Recorded Temperature ( °F )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	55.4	53.6	49.1	57.2	64.4	68.9	69.8	69.8	66.2	59.0	53.6	53.6	49.1
Dulles	-18.0	-14.0	-1.0	17.0	28.0	36.0	41.0	38.0	30.0	15.0	9.0	-4.0	-18.0

Average Length of Day ( Hours )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	11.4	11.9	12.4	13.0	13.6	13.8	13.7	13.2	12.6	12.0	11.5	11.3	12.5
Dulles	10.3	11.2	12.4	13.7	14.8	15.4	15.1	14.1	12.8	11.6	10.5	10.0	12.7

Average Number of Days With Fog ( Days )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun					0.1	0.1	0.1	0.1	0.1				0.5
Dulles	13.0	10.0	12.0	10.0	14.0	16.0	19.0	20.0	18.0	14.0	12.0	12.0	170.0

Average Wind Speed ( mph )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	9.0	10.0	10.0	10.0	10.0	10.0	9.0	9.0	9.0	9.0	9.0	9.0	9.0
Dulles	7.8	8.0	8.6	8.1	7.0	6.3	5.9	5.6	6.0	6.3	7.0	7.3	7.0

Cooling Degree Days ( Days )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	291.4	292.4	375.1	418.5	514.6	532.5	567.3	562.7	520.5	482.1	384.0	330.2	5271.3
Dulles			3.0	17.0	72.0	237.0	363.0	324.0	141.0	19.0	2.0		1178.0

Growing Degree Days ( Days )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	756.4	716.1	840.1	868.5	979.6	982.5	1032.3	1027.7	970.5	947.1	834.0	795.2	10750.0
Dulles	9.0	9.0	53.0	181.0	410.0	672.0	828.0	787.0	536.0	218.0	64.0	14.0	3780.0

Average Number of Days With Thunderstorms ( Days )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	0.1	0.1	0.1		0.2	0.3	0.1	0.2	0.2	0.3	0.3	0.1	2.0
Dulles			1.0	2.0	4.0	6.0	6.0	5.0	2.0	1.0	1.0		28.0

Average Daily Solar Radiation - Diffuse ( kWh/m2 )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	1.2	1.4	1.6	1.8	2.0	2.2	2.1	2.0	1.9	1.6	1.3	1.2	1.7
Dulles	0.8	1.1	1.5	2.0	2.3	2.5	2.4	2.1	1.7	1.2	0.9	0.7	1.6

Average Daily Solar Radiation - Direct ( kWh/m2 )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	5.7	6.6	6.9	7.3	6.9	6.0	6.7	6.6	5.9	5.8	5.8	5.4	6.3
Dulles	3.1	3.7	4.1	4.4	4.7	4.8	4.9	4.6	4.6	4.6	3.5	2.9	4.2

Average Daily Solar Radiation - Global ( kWh/m2 )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	4.3	5.2	6.1	6.8	6.9	6.4	6.8	6.5	5.8	5.1	4.5	4.0	5.7
Dulles	2.0	2.8	3.7	4.7	5.3	5.6	5.6	5.0	4.3	3.4	2.2	1.7	3.9

Average Daily Solar Radiation - Reflected ( kWh/m2 )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	5.2	6.0	6.4	6.6	6.3	6.4	6.7	6.2	5.9	5.7	5.4	4.8	6.0
Dulles	3.1	3.7	4.3	4.7	4.9	4.9	5.0	4.8	4.7	4.5	3.4	2.9	4.3

Maximum Daily Solar Radiation - Diffuse ( kWh/m2 )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	1.4	1.6	1.8	2.1	2.5	2.5	2.5	2.2	2.0	1.7	1.4	1.3	1.9
Dulles	0.8	1.2	1.6	2.1	2.4	2.5	2.5	2.2	1.7	1.3	0.9	0.8	1.7

Maximum Daily Solar Radiation - Direct ( kWh/m2 )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	6.8	7.6	7.9	8.4	8.3	7.1	8.1	7.7	7.9	6.9	7.0	6.8	7.5
Dulles	3.9	5.2	5.5	5.6	6.4	6.6	5.8	5.6	6.0	6.4	4.8	3.6	5.4

Maximum Daily Solar Radiation - Global ( kWh/m2 )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	4.3	5.2	6.1	6.8	6.9	6.4	6.8	6.5	5.8	5.1	4.5	4.0	5.7
Dulles	2.0	2.8	3.7	4.7	5.3	5.6	5.6	5.0	4.3	3.4	2.2	1.7	3.9

Maximum Daily Solar Radiation - Reflected ( kWh/m2 )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	5.9	6.6	6.9	7.1	6.9	7.0	7.4	6.7	6.9	6.3	6.0	5.5	6.6
Dulles	3.7	4.6	5.3	5.4	5.8	5.7	5.4	5.4	5.5	5.7	4.3	3.4	5.0

Minimum Daily Solar Radiation - Diffuse ( kWh/m2 )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	1.1	1.2	1.4	1.6	1.8	2.1	1.8	1.8	1.5	1.4	1.1	1.0	1.5
Dulles	0.8	1.0	1.4	1.9	2.2	2.3	2.3	2.0	1.5	1.0	0.8	0.7	1.5

Minimum Daily Solar Radiation - Direct ( kWh/m2 )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	3.8	5.0	5.7	5.6	3.6	3.8	3.7	5.5	4.5	4.7	4.8	4.2	4.6
Dulles	2.3	2.4	2.7	3.3	2.0	3.4	3.9	3.6	3.4	3.0	1.9	1.8	2.8

Minimum Daily Solar Radiation - Global ( kWh/m2 )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	3.5	4.5	5.5	6.0	5.0	5.1	5.0	6.0	5.1	4.6	4.1	3.5	4.8
Dulles	1.7	2.2	3.0	4.0	3.5	4.7	5.0	4.4	3.7	2.7	1.6	1.3	3.2

Minimum Daily Solar Radiation - Reflected ( kWh/m2 )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	4.1	5.1	5.8	5.8	4.7	5.0	4.9	5.7	5.1	5.0	4.8	4.1	5.0
Dulles	2.5	2.8	3.4	4.0	3.3	4.2	4.5	4.2	3.9	3.4	2.2	2.0	3.4

Average Number of Days Above 80F/26C ( Days )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	20.0	21.0	26.0	29.0	31.0	30.0	31.0	31.0	30.0	30.0	28.0	23.0	330.0
Dulles			0.8	3.8	10.1	22.3	27.9	27.1	14.1	3.1	0.3		109.6