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Built 2026-10-19 (19 October 2026)

Mistassini Threshold Days by Year (CA007064998)

15 fixed thresholds counted per year at Mistassini (CA007064998): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mistassini Thresholds

  • Mistassini: days with 10 cm (3.9 in) or more of snowfall in 28 years, most in 1920 with 16.
  • Mistassini: days with 10 mm (0.39 in) or more of precipitation in 27 years, most in 1920 with 41.
  • Mistassini: days with 25 mm (0.98 in) or more of precipitation in 27 years, most in 1977 with 9.
  • Mistassini: days with a maximum temperature at or above 30 C (86 F) in 24 years, most in 1916 with 12.
  • 15 fixed thresholds have at least one qualifying day at Mistassini.
24 years with a qualifying day
Days at or above 30 C (86 F) per year at Mistassini Days per year at Mistassini with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 12 in 1916. 0510151912: 111913: 11914: 61915: 21916: 121917: 31918: 31920: 31921: 121922: 101964: 11965: 21966: 11967: 41968: 31969: 31970: 101971: 21972: 21973: 11974: 21975: 81977: 51979: 519121915191819221966196919721975
Days per year at Mistassini with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 12 in 1916.
Days at or above 30 C (86 F) per year at Mistassini
YearDaysDecade average
1912115.4
191315.4
191465.4
191525.4
1916125.4
191735.4
191835.4
192038.3
1921128.3
1922108.3
196412.3
196522.3
196612.3
196742.3
196832.3
196932.3
1970104.4
197124.4
197224.4
197314.4
197424.4
197584.4
197754.4
197954.4
First to last qualifying date each year at Mistassini For each year, a bar from the first to the last day at Mistassini meeting 30 C (86 F). 1912: 24 June 1912 to 16 July 19121913: 2 July 1913 to 2 July 19131914: 8 July 1914 to 23 September 19141915: 6 June 1915 to 16 September 19151916: 7 July 1916 to 21 August 19161917: 26 July 1917 to 2 August 19171918: 18 May 1918 to 23 July 19181920: 28 May 1920 to 29 August 19201921: 30 May 1921 to 3 September 19211922: 2 June 1922 to 29 July 19221964: 18 July 1964 to 18 July 19641965: 20 June 1965 to 28 June 19651966: 24 May 1966 to 24 May 19661967: 3 June 1967 to 22 July 19671968: 15 July 1968 to 18 July 19681969: 27 June 1969 to 31 August 19691970: 9 June 1970 to 15 August 19701971: 29 May 1971 to 18 June 19711972: 28 May 1972 to 20 July 19721973: 24 July 1973 to 24 July 19731974: 14 July 1974 to 22 August 19741975: 22 June 1975 to 9 August 19751977: 22 May 1977 to 20 July 19771979: 8 July 1979 to 25 July 197919121915191819221966196919721975JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Mistassini meeting 30 C (86 F).
First to last qualifying date each year at Mistassini
YearFirst dateLast date
19121912-06-241912-07-16
19131913-07-021913-07-02
19141914-07-081914-09-23
19151915-06-061915-09-16
19161916-07-071916-08-21
19171917-07-261917-08-02
19181918-05-181918-07-23
19201920-05-281920-08-29
19211921-05-301921-09-03
19221922-06-021922-07-29
19641964-07-181964-07-18
19651965-06-201965-06-28
19661966-05-241966-05-24
19671967-06-031967-07-22
19681968-07-151968-07-18
19691969-06-271969-08-31
19701970-06-091970-08-15
19711971-05-291971-06-18
19721972-05-281972-07-20
19731973-07-241973-07-24
19741974-07-141974-08-22
19751975-06-221975-08-09
19771977-05-221977-07-20
19791979-07-081979-07-25

Every Fixed Threshold

Fixed thresholds at Mistassini
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days241219165
35 C (95 F): Days4119121
90 F (32.2 C): Days10519124
0 C (32 F): Ice days (max24144191277
0 C (32 F): Frost days (min242161972168
-10 C (14 F): Days with min24139191280
-20 C (-4 F): Days with min2485191751
-30 C (-22 F): Days with min2443191721
-40 C (-40 F): Days with min18619174
20 C (68 F): Tropical nights (min8319222
10 mm (0.39 in): Days with 10 mm or more rain2741192021
25 mm (0.98 in): Days with 25 mm or more rain27919773
50 mm (1.97 in): Days with 50 mm or more rain6219732
10 cm (3.9 in): Days with 10 cm or more snowfall281619204
25 cm (9.8 in): Days with 25 cm or more snowfall13319721

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1912.

Download the Data

  • Data for Mistassini 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 . Last revised (2026-10-17).