COMPARE CITIES (Beta)

Cancun and Dulles are 2,171.7 kilometers 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 way, way, way the heck warmer than than Dulles. On average, Cancun is 27.3°C while Dulles is 12.9°C, a difference of 14.4°C. Cancun is warmest on average in August, when the average high temperature is °F, while Dulles is warmest in July, when the average high temperature is °F. Cancun is coolest on average in January, when the average low temperature is °F, while Dulles is coolest in January, when the average low temperature is °F.

Cancun has more precipitation than Dulles. On average, Cancun has 1300.0 mm of precipitation while Dulles has 1054.1 mm, a difference of 245.9 millimeters.

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

°F | °C

Average Dew Point ( °C )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	20.0	20.0	20.0	21.0	22.0	24.0	24.0	24.0	23.0	22.0	21.0	20.0	22.0
Dulles	-5.4	-4.3	-0.9	4.6	11.0	16.4	18.5	17.8	14.2	7.7	1.8	-3.1	6.6

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 ( mm )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	105.0	50.0	46.0	29.0	89.0	141.0	70.0	88.0	184.0	282.0	128.0	90.0	1300.0
Dulles	68.6	68.6	86.4	88.9	116.8	101.6	94.0	88.9	99.1	83.8	86.4	76.2	1054.1

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 ( °C )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	27.0	27.0	28.0	29.0	31.0	31.0	32.0	32.0	31.0	30.0	28.0	27.0	30.0
Dulles	5.8	8.0	13.1	19.3	23.9	28.8	31.1	30.3	26.3	20.1	14.2	7.8	19.1

Average Low Temperature ( °C )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	19.9	20.4	21.2	22.7	24.0	24.7	24.8	24.6	24.3	23.4	22.0	20.7	22.7
Dulles	-4.5	-3.3	0.5	5.6	10.7	16.1	18.6	17.9	13.5	6.6	1.8	-2.7	6.8

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 ( °C )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	24.1	25.0	26.0	27.4	28.8	29.2	29.6	29.7	29.0	27.6	26.0	24.7	27.3
Dulles	0.7	2.3	6.8	12.4	17.3	22.4	24.8	24.1	19.9	13.3	8.0	2.6	12.9

Highest Recorded Temperature ( °C )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	35.0	32.0	32.0	36.0	37.0	38.0	38.0	37.0	38.0	38.0	37.0	31.0	38.0
Dulles	23.9	26.1	31.7	33.9	36.1	38.9	40.6	40.0	37.2	34.4	28.9	26.1	40.6

Lowest Recorded Temperature ( °C )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	13.0	12.0	9.5	14.0	18.0	20.5	21.0	21.0	19.0	15.0	12.0	12.0	9.5
Dulles	-27.8	-25.6	-18.3	-8.3	-2.2	2.2	5.0	3.3	-1.1	-9.4	-12.8	-20.0	-27.8

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 ( km/h )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	14.0	16.0	16.0	16.0	16.0	16.0	14.0	14.0	14.0	14.0	14.0	14.0	14.0
Dulles	12.6	12.9	13.8	13.0	11.3	10.1	9.5	9.0	9.7	10.1	11.3	11.7	11.3

Cooling Degree Days ( Days )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	161.9	162.4	208.4	232.5	285.9	295.8	315.2	312.6	289.2	267.8	213.3	183.4	3075.2
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	420.2	397.8	466.7	482.5	544.2	545.8	573.5	570.9	539.2	526.2	463.3	441.8	6325.5
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 ( Mj/m2 )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	4.4	4.9	5.8	6.5	7.3	8.0	7.5	7.1	6.7	5.6	4.6	4.3	6.0
Dulles	3.0	4.0	5.5	7.2	8.3	8.9	8.6	7.6	5.9	4.3	3.2	2.7	5.8

Average Daily Solar Radiation - Direct ( Mj/m2 )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	20.6	23.6	24.8	26.2	24.8	21.5	24.2	23.6	21.1	21.0	20.9	19.4	22.6
Dulles	11.3	13.4	14.7	15.8	16.9	17.4	17.6	16.4	16.6	16.6	12.6	10.4	15.0

Average Daily Solar Radiation - Global ( Mj/m2 )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	15.4	18.8	21.9	24.6	24.7	23.0	24.4	23.5	20.8	18.5	16.1	14.3	20.5
Dulles	7.1	9.9	13.4	16.8	19.2	20.3	20.1	17.9	15.3	12.1	8.0	6.2	13.9

Average Daily Solar Radiation - Reflected ( Mj/m2 )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	18.9	21.7	23.1	23.8	22.6	22.9	24.2	22.2	21.1	20.5	19.4	17.1	21.5
Dulles	11.2	13.4	15.6	17.0	17.6	17.8	17.9	17.3	17.0	16.3	12.3	10.3	15.3

Maximum Daily Solar Radiation - Diffuse ( Mj/m2 )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	5.2	5.7	6.5	7.6	8.8	8.9	8.9	7.7	7.3	6.2	5.1	4.8	6.9
Dulles	3.0	4.1	5.7	7.4	8.6	9.1	8.8	7.8	6.3	4.6	3.3	2.7	5.9

Maximum Daily Solar Radiation - Direct ( Mj/m2 )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	24.5	27.5	28.3	30.3	29.8	25.5	29.2	27.6	28.6	24.7	25.0	24.4	27.1
Dulles	14.0	18.5	19.8	20.0	23.1	23.6	20.8	20.0	21.5	23.1	17.4	13.0	19.6

Maximum Daily Solar Radiation - Global ( Mj/m2 )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	15.4	18.8	21.9	24.6	24.7	23.0	24.4	23.5	20.8	18.5	16.1	14.3	20.5
Dulles	7.1	9.9	13.4	16.8	19.2	20.3	20.1	17.9	15.3	12.1	8.0	6.2	13.9

Maximum Daily Solar Radiation - Reflected ( Mj/m2 )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	21.1	23.8	25.0	25.7	24.8	25.1	26.7	24.1	25.0	22.5	21.7	19.8	23.8
Dulles	13.4	16.7	18.9	19.4	20.7	20.7	19.5	19.3	19.9	20.6	15.6	12.3	18.1

Minimum Daily Solar Radiation - Diffuse ( Mj/m2 )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	3.9	4.2	5.1	5.7	6.4	7.4	6.5	6.3	5.3	5.0	4.0	3.6	5.3
Dulles	2.8	3.6	5.1	6.8	7.7	8.3	8.3	7.3	5.4	3.5	2.8	2.6	5.4

Minimum Daily Solar Radiation - Direct ( Mj/m2 )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	13.6	18.0	20.6	20.1	13.1	13.6	13.2	19.9	16.3	16.7	17.3	14.9	16.4
Dulles	8.3	8.6	9.7	11.8	7.2	12.1	13.9	12.9	12.2	10.8	7.0	6.4	10.1

Minimum Daily Solar Radiation - Global ( Mj/m2 )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	12.4	16.3	19.9	21.4	18.0	18.4	18.1	21.6	18.2	16.4	14.6	12.5	17.3
Dulles	6.0	7.9	10.8	14.5	12.7	17.1	17.9	15.8	13.1	9.8	5.9	4.8	11.4

Minimum Daily Solar Radiation - Reflected ( Mj/m2 )
City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Cancun	14.6	18.4	20.9	20.7	16.8	18.1	17.7	20.4	18.4	18.0	17.2	14.6	18.0
Dulles	9.0	9.9	12.1	14.5	11.7	15.1	16.1	15.3	14.1	12.3	8.1	7.2	12.1

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