Hanover Threshold Days by Year

15 fixed thresholds counted per year at Hanover (CA006113329): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hanover Thresholds

Hanover: nights with a minimum temperature at or below 0 C (32 F) in 12 years, most in 1976 with 177.
Hanover: nights with a minimum temperature at or below -10 C (14 F) in 12 years, most in 1978 with 70.
Hanover: nights with a minimum temperature at or below -20 C (-4 F) in 12 years, most in 1978 with 24.
Hanover: nights with a minimum temperature at or above 20 C (68 F) in 12 years, most in 1983 with 7.
15 fixed thresholds have at least one qualifying day at Hanover.

Days at or above 30 C (86 F)

10 years with a qualifying day

Days per year at Hanover with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 28 in 1983.

For each year, a bar from the first to the last day at Hanover meeting 30 C (86 F).

First to last qualifying date each year at Hanover
Year	First date	Last date
1972	1972-07-11	1972-08-22
1975	1975-05-20	1975-08-02
1976	1976-06-13	1976-09-08
1977	1977-05-20	1977-08-28
1978	1978-05-26	1978-08-22
1979	1979-05-11	1979-09-05
1980	1980-05-23	1980-08-29
1981	1981-06-15	1981-07-19
1982	1982-05-06	1982-09-13
1983	1983-06-12	1983-09-10

Every Fixed Threshold

Fixed thresholds at Hanover
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	10	28	1983	28
35 C (95 F): Days	1	2	1977	2
90 F (32.2 C): Days	4	4	1977	4
0 C (32 F): Ice days (max	10	88	1978	64
0 C (32 F): Frost days (min	12	177	1976	155
-10 C (14 F): Days with min	12	70	1978	44
-20 C (-4 F): Days with min	12	24	1978	10
-30 C (-22 F): Days with min	8	7	1979	2
-40 C (-40 F): Days with min	1	1	1979	1
20 C (68 F): Tropical nights (min	12	7	1983	7
10 mm (0.39 in): Days with 10 mm or more rain	12	35	1982	34
25 mm (0.98 in): Days with 25 mm or more rain	12	10	1982	4
50 mm (1.97 in): Days with 50 mm or more rain	6	2	1983	2
10 cm (3.9 in): Days with 10 cm or more snowfall	12	10	1976	8
25 cm (9.8 in): Days with 25 cm or more snowfall	5	3	1982	3

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1972.

Download the Data

Data for Hanover threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Year	Days	Decade average
1972	7	11.7
1975	18	11.7
1976	3	11.7
1977	15	11.7
1978	13	11.7
1979	14	11.7
1980	8	13.5
1981	8	13.5
1982	10	13.5
1983	28	13.5

Hanover Threshold Days by Year

Key Facts for Hanover Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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