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Siena vs Tusayan

Cfa Humid subtropicalCsb Warm-summer Mediterranean

Comparing Siena change · Tusayan change

Bottom line

Siena is the warmer of the two — about 10°F on the annual average; Siena is the wetter, with 21 in more rain a year, and Tusayan the sunnier.

Warmer Siena 10°F on the year

Wetter Siena 21 in more a year

Sunnier Tusayan 16 pp less cloud

Colder winters Tusayan 19°F colder nights

How the seasons compare

The differences between Siena and Tusayan, in everyday terms.

Summers

Summers are nearly the same

Siena: Hot
Tusayan: Warm

Winters

Siena has much milder winters

Siena: Chilly
Tusayan: Very cold

Rain & snow

Siena is much wetter

Siena: Moderate rainfall
Tusayan: Fairly dry

Sky

Tusayan is sunnier

Siena: Partly cloudy
Tusayan: Fairly sunny

Month-by-month charts

Temperature

Siena is the warmer of the two — about 10°F on the annual average.

Precipitation

Siena is the wetter — about 21 in more across the year.

Clear skies

Tusayan has the clearer skies — the higher line.

Exact monthly numbers

Tap a metric to open its full table. Desktop shows all twelve months; on a phone each metric splits into Jan–Jun and Jul–Dec.

Avg high (°F) Siena runs higher most of the year

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Siena	49	52	59	66	74	82	89	89	78	68	57	50
Tusayan	45	47	55	61	71	83	86	83	77	66	54	44
Difference	-4	-5	-4	-4	-3	+1	-3	-6	-1	-2	-3	-5

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Siena	49	52	59	66	74	82
Tusayan	45	47	55	61	71	83
Difference	-4	-5	-4	-4	-3	+1

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Siena	89	89	78	68	57	50
Tusayan	86	83	77	66	54	44
Difference	-3	-6	-1	-2	-3	-5

Avg low (°F) Siena runs higher most of the year

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Siena	33	33	37	42	49	56	60	60	53	47	41	34
Tusayan	14	16	21	25	31	38	49	48	40	29	20	13
Difference	-18	-17	-16	-17	-18	-18	-11	-12	-13	-19	-21	-21

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Siena	33	33	37	42	49	56
Tusayan	14	16	21	25	31	38
Difference	-18	-17	-16	-17	-18	-18

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Siena	60	60	53	47	41	34
Tusayan	49	48	40	29	20	13
Difference	-11	-12	-13	-19	-21	-21

Precipitation (in) Siena runs higher most of the year

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Siena	2.1	2.2	2.5	2.8	2.9	2.1	1.7	1.7	3.8	4.3	4.8	3.2
Tusayan	1.1	1	1	0.7	0.6	0.4	1.9	2.1	1.3	1.3	0.7	0.8
Difference	-1	-1.2	-1.5	-2.1	-2.3	-1.7	+0.3	+0.4	-2.4	-3	-4.1	-2.4

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Siena	2.1	2.2	2.5	2.8	2.9	2.1
Tusayan	1.1	1	1	0.7	0.6	0.4
Difference	-1	-1.2	-1.5	-2.1	-2.3	-1.7

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Siena	1.7	1.7	3.8	4.3	4.8	3.2
Tusayan	1.9	2.1	1.3	1.3	0.7	0.8
Difference	+0.3	+0.4	-2.4	-3	-4.1	-2.4

Cloud cover (%) Siena runs higher most of the year

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Siena	65	61	62	65	62	50	36	39	53	62	69	65
Tusayan	48	49	46	41	37	27	50	46	32	32	37	48
Difference	-17	-12	-16	-24	-25	-22	+14	+8	-20	-31	-32	-17

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Siena	65	61	62	65	62	50
Tusayan	48	49	46	41	37	27
Difference	-17	-12	-16	-24	-25	-22

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Siena	36	39	53	62	69	65
Tusayan	50	46	32	32	37	48
Difference	+14	+8	-20	-31	-32	-17

Relative humidity (%) Siena runs higher most of the year

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Siena	91	86	82	78	73	63	54	55	68	80	89	91
Tusayan	61	57	49	41	35	25	37	43	40	42	50	60
Difference	-29	-29	-33	-37	-38	-38	-17	-12	-28	-38	-38	-31

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Siena	91	86	82	78	73	63
Tusayan	61	57	49	41	35	25
Difference	-29	-29	-33	-37	-38	-38

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Siena	54	55	68	80	89	91
Tusayan	37	43	40	42	50	60
Difference	-17	-12	-28	-38	-38	-31

How both climates are changing

Both cities are warming. Each city has its own warming trend; see its trends page for the year-by-year detail. Siena trends → · Tusayan trends →

Methodology & sources

Siena

Temperature & precipitation — the official 1991–2020 climate normals from the WMO's CLINO 1991–2020 collection, measured at Arezzo, about 45 km from the city centre.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

Tusayan

Temperature & precipitation — 1991–2020 normals computed from 24 years of daily observations at Grand Canyon NP AP, a weather station, about 4 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →

← change Siena · change Tusayan → · Siena page · Tusayan page