Thunderstorms and Heavy Rainfall in the Mid-Atlantic; Fire Weather Concerns in the West

Thunderstorms are expected to bring heavy rain and potential significant flash and urban flooding to the Mid-Atlantic on Thursday, especially along the I-95 urban corridor. Dry conditions, gusty winds, and isolated dry thunderstorms will continue to bring a critical fire weather threat to the northwestern Great Basin into the interior Northwest through Thursday. Read More >

New 30 Year Climate Normals (1991 - 2020)

The 30-year normals are updated once every 10 years by the National Centers for Environmental Information (NCEI). Some of the popular variables calculated include: temperature, precipitation and snowfall that are listed here for our primary climate stations of Buffalo, Rochester and Watertown. The data displayed here is from NCEI which is the official source of climate normals. Further information on the new climate normals, including additional locations across the country can be found from NCEI at this weblink.


Key

Warmer		Increase					Old = 1981 - 2010
Cooler		Decrease					New = 1991 - 2020
No Change		No Change

BUFFALO

Max Temperature		Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
°F	Old	31.2	33.3	42.0	55.0	66.5	75.3	79.9	78.4	71.1	59.0	47.6	36.1	56.4
	New	32.1	33.3	41.8	54.7	67.4	75.6	80.2	79.0	72.3	59.6	47.8	37.2	56.8
		0.9	0.0	-0.2	-0.3	0.9	0.3	0.3	0.6	1.2	0.6	0.2	1.1	0.4

Min Temperature		Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
°F	Old	18.5	19.2	26.0	36.8	47.4	57.3	62.3	60.8	53.4	42.7	33.9	24.1	40.3
	New	19.0	19.5	26.4	36.5	48.3	58.1	63.1	61.7	54.5	43.9	34.2	25.6	40.9
		0.5	0.3	0.4	-0.3	0.9	0.8	0.8	0.9	1.1	1.2	0.3	1.5	0.6

Mean Temp		Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
°F	Old	24.9	26.3	34.0	45.9	56.9	66.3	71.1	69.6	62.2	50.8	40.7	30.1	48.3
	New	25.5	26.4	34.1	45.6	57.9	66.9	71.7	70.4	63.4	51.7	41.0	31.4	48.8
		0.6	0.1	0.1	-0.3	1.0	0.6	0.6	0.8	1.2	0.9	0.3	1.3	0.5

Precipitation		Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
(inches)	Old	3.18	2.49	2.87	3.01	3.46	3.66	3.23	3.26	3.90	3.52	4.01	3.89	40.48
	New	3.35	2.49	2.89	3.37	3.37	3.37	3.23	3.23	4.10	4.03	3.50	3.75	40.68
		0.17	0.00	0.02	0.36	-0.09	-0.29	0.00	-0.03	0.20	0.51	-0.51	-0.14	0.20

Snow		Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
(inches)	Old	25.3	17.3	12.9	2.7	0.3	0.0	0.0	0.0	0.0	0.9	7.9	27.4	94.7
	New	26.7	18.1	14.1	2.5	0.0	0.0	0.0	0.0	0.0	0.9	7.8	25.3	95.4
		1.4	0.8	1.2	-0.2	-0.3	0.0	0.0	0.0	0.0	0.0	-0.1	-2.1	0.7




Rochester

Max Temperature		Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
°F	Old	31.7	34.1	42.8	56.0	67.6	76.6	81.0	79.1	71.6	59.6	48.0	36.5	57.2
	New	33.4	35.2	43.6	56.6	69.4	77.9	82.5	80.5	73.6	61.2	49.1	38.5	58.4
		1.7	1.1	0.8	0.6	1.8	1.3	1.5	1.4	2.0	1.6	1.1	2.0	1.2

Min Temperature		Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
°F	Old	17.6	18.6	25.8	36.6	46.3	55.9	60.7	59.5	52.0	41.5	33.0	23.5	39.3
	New	19.0	19.6	26.8	37.1	48.2	57.4	62.2	61.0	53.6	43.3	34.0	25.4	40.6
		1.4	1.0	1.0	0.5	1.9	1.5	1.5	1.5	1.6	1.8	1.0	1.9	1.3

Mean Temp		Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
°F	Old	24.7	26.4	34.3	46.3	57.0	66.2	70.8	69.3	61.8	50.6	40.5	30.0	48.2
	New	26.2	27.4	35.2	46.8	58.8	67.6	72.3	70.7	63.6	52.2	41.5	32.0	49.5
		1.5	1.0	0.9	0.5	1.8	1.4	1.5	1.4	1.8	1.6	1.0	2.0	1.3

Precipitation		Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
(inches)	Old	2.41	1.95	2.50	2.73	2.87	3.34	3.33	3.47	3.38	2.72	2.94	2.63	34.27
	New	2.55	2.13	2.49	2.99	2.86	3.37	3.56	3.31	3.18	3.22	2.76	2.67	35.09
		0.14	0.18	-0.01	0.26	-0.01	0.03	0.23	-0.16	-0.20	0.50	-0.18	0.04	0.82

Snow		Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
(inches)	Old	28.2	21.5	16.3	3.9	0.4	0.0	0.0	0.0	0.0	0.1	7.3	21.8	99.5
	New	27.4	23.1	17.9	3.0	0.1	0.0	0.0	0.0	0.0	0.1	8.1	22.3	102.0
		-0.8	1.6	1.6	-0.9	-0.3	0.0	0.0	0.0	0.0	0.0	0.8	0.5	2.5



Watertown

Max Temperature		Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
°F	Old	29.3	31.7	40.7	54.5	65.8	74.4	79.2	78.0	70.4	58.2	46.8	35.0	55.3
	New	29.8	31.4	40.0	53.7	66.2	74.5	79.2	78.2	71.2	58.4	46.6	35.5	55.4
		0.5	-0.3	-0.7	-0.8	0.4	0.1	0.0	0.2	0.8	0.2	-0.2	0.5	0.1

Min Temperature		Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
°F	Old	9.4	10.4	20.5	33.2	43.4	52.6	58.1	56.3	48.5	38.3	29.7	17.8	34.9
	New	10.0	10.7	20.7	32.5	43.7	53.1	58.8	56.7	48.8	39.2	29.5	19.0	35.2
		0.6	0.3	0.2	-0.7	0.3	0.5	0.7	0.4	0.3	0.9	-0.2	1.2	0.3

Mean Temp		Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
°F	Old	19.4	21.1	30.6	43.9	54.6	63.5	68.6	67.1	59.5	48.3	38.3	26.4	45.1
	New	19.9	21.1	30.4	43.1	55.0	63.8	69.0	67.5	60.0	48.8	38.0	27.3	45.3
		0.5	0.0	-0.2	-0.8	0.4	0.3	0.4	0.4	0.5	0.5	-0.3	0.9	0.2

Precipitation		Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
(inches)	Old	2.67	2.22	2.30	2.90	3.07	2.85	2.65	3.15	3.72	3.65	3.76	3.15	36.09
	New	2.86	2.18	2.37	3.07	2.97	3.09	3.01	3.20	3.56	4.22	3.40	3.14	37.07
		0.19	-0.04	0.07	0.17	-0.10	0.24	0.36	0.05	-0.16	0.57	-0.36	-0.01	0.98



Key

Warmer		Increase					Old = 1981 - 2010
Cooler		Decrease					New = 1991 - 2020
No Change		No Change