Sofia Threshold Days by Year (BUM00015614)

9 fixed thresholds counted per year at Sofia (BUM00015614): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Sofia Thresholds

Sofia: days with 10 mm (0.39 in) or more of precipitation in 28 years, most in 1980 with 21.
Sofia: days with 25 mm (0.98 in) or more of precipitation in 28 years, most in 1979 with 6.
Sofia: days with 50 mm (1.97 in) or more of precipitation in 11 years, most in 1980 with 2.
Sofia: days with a maximum temperature at or above 30 C (86 F) in 9 years, most in 1988 with 27.
9 fixed thresholds have at least one qualifying day at Sofia.

Days at or above 30 C (86 F)

9 years with a qualifying day

Days per year at Sofia with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 27 in 1988.

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

First to last qualifying date each year at Sofia
Year	First date	Last date
1967	1967-07-17	1967-08-11
1978	1978-06-12	1978-08-08
1979	1979-06-17	1979-08-23
1980	1980-06-24	1980-08-09
1981	1981-06-27	1981-08-11
1983	1983-07-28	1983-09-12
1986	1986-07-24	1986-09-18
1988	1988-07-02	1988-08-31
1989	1989-04-05	1989-08-28

Every Fixed Threshold

Fixed thresholds at Sofia
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	9	27	1988	9
35 C (95 F): Days	2	2	1988	1
90 F (32.2 C): Days	8	13	1988	1
100 F (37.8 C): Days	1	1	1989	1
0 C (32 F): Ice days (max	9	35	1981	12
10 mm (0.39 in): Days with 10 mm or more rain	28	21	1980	17
25 mm (0.98 in): Days with 25 mm or more rain	28	6	1979	1
50 mm (1.97 in): Days with 50 mm or more rain	11	2	1980	1
100 mm (3.94 in): Days with 100 mm or more rain	1	0	n/a	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1967.

Download the Data

Data for Sofia 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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Year	Days	Decade average
1967	9	9
1978	10	11.5
1979	13	11.5
1980	15	14
1981	12	14
1983	6	14
1986	15	14
1988	27	14
1989	9	14

Sofia Threshold Days by Year (BUM00015614)

Key Facts for Sofia Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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