Can you see the northern lights in Saint-Jérôme in June?

On dark, clear nights with enough activity. 30 of 30 nights at Saint-Jérôme have civil darkness, and 3% of past June days reached Kp 6.

How dark is Saint-Jérôme in June?

Saint-Jérôme averages 6.9 hours of civil night a night in June 2027, from 7 h 9 min on the 1st to 6 h 57 min on the last night.

How cloudy is Saint-Jérôme in June?

NASA POWER's 2001 to 2020 climatology gives Saint-Jérôme's 1 degree cell 61% mean cloud in June, against 64% for the whole year. It is an all-hours average, not a forecast.

What is the best night in June 2027 for aurora in Saint-Jérôme?

By darkness and moon alone, Jun 1, with 4 h of moon-free darkness inside 10 PM to 2 AM at Saint-Jérôme. Activity on that date will only be known hours ahead.

Is June or July better in Saint-Jérôme?

By civil night times the clear share, June scores 2.7 hours at Saint-Jérôme and July 3.2. July comes out ahead.

Saint-Jérôme · June 2027

Northern lights in Saint-Jérôme in June 2027

Answer

June gives Saint-Jérôme 6.9 hours of civil night on the 15th, the lightest month of its year, under 61% mean cloud. 3% of June days since 1996 reached Kp 6, enough for the oval edge to reach Saint-Jérôme.

6.9 h

civil night, average night

SunCalc for 45.78, -74.00; NASA POWER; GFZ Kp

June against the rest of the year

4.1

4.0

3.3

2.8

2.7

3.2

3.8

4.8

3.8

3.4

June cloud at Saint-Jérôme averages 61% in NASA POWER's 2001 to 2020 record, 3 points clearer than its yearly mean. September is Saint-Jérôme's clearest month at 54%. By civil night times clear sky, June scores 2.7 hours at Saint-Jérôme, 12th of 12. Trois-Rivières, 129 km away, averages 63%, cloudier by 2 points.

Civil night at Saint-Jérôme starts June at 7 h 9 min and reaches 6 h 57 min by June 30, 0.2 hours shorter. SWPC's 10 PM to 2 AM window is fully dark on every night. True astronomical darkness, the sun 18 degrees down, lasts 2.7 hours on the 15th.

June night by night

June opens toward a new moon on Jun 4, with full moon on Jun 18, in America/Toronto dates. Saint-Jérôme gets 98 hours of civil night with the moon below the horizon across the month. The best of them for moon-free darkness inside 10 PM to 2 AM: Jun 1 (4 h), Jun 2 (4 h), Jun 3 (4 h).

1
9% lit
5.8 h
2
4% lit
6.4 h
3
1% lit
7.1 h
4
0% lit
7.1 h
New
5
3% lit
6.2 h
6
8% lit
5.4 h
7
16% lit
4.8 h
8
25% lit
4.3 h
9
36% lit
3.9 h
10
47% lit
3.5 h
11
58% lit
3.2 h
12
68% lit
2.9 h
13
78% lit
2.5 h
14
86% lit
2.1 h
15
92% lit
1.6 h
16
97% lit
0.9 h
17
99% lit
0.2 h
18
100% lit
0.0 h
Full
19
99% lit
0.3 h
20
96% lit
0.9 h
21
91% lit
1.4 h
22
85% lit
1.7 h
23
78% lit
2.0 h
24
70% lit
2.3 h
25
60% lit
2.6 h
26
51% lit
2.9 h
27
40% lit
3.2 h
28
30% lit
3.6 h
29
21% lit
4.1 h
30
12% lit
4.7 h

Each cell is the night that starts on that date. Hours are civil-dark time with the moon below the horizon; the green rule scales with them. Green outline: new moon. Bone outline: full moon.

Activity in past Junes

Saint-Jérôme needs Kp 6 for the average oval edge to sit overhead. 29 of the 900 June days from 1996 to 2025 (3%) reached it in the GFZ Potsdam record, 7th of 12 months; storm days with Kp 5 or more made up 8%. Saint-Jérôme sits at 55.0 degrees geomagnetic. The lowest NOAA storm level whose typical viewing latitude reaches it is G3 (Kp = 7). By SWPC's rule the average oval edge is overhead only at Kp 6.

June across Canada

No month-page town in Canada has more civil night on June 15 than Saint-Jérôme; the national median is 5.9 hours. Coming from May (7.8 hours at Saint-Jérôme), June loses darkness, and the nights keep growing into July (7.3 hours on the 15th). The June solstice falls on June 21, 10:07 Saint-Jérôme time.

Civil night on June 15 and June cloud, month-page towns in Canada
Town	Civil night	Cloud
Saint-Jérôme	6.9 h	61%
Greater Sudbury	6.8 h	60%
Trois-Rivières	6.8 h	63%
Sydney	6.8 h	70%
Québec	6.7 h	65%
St. John's	6.6 h	77%
Saguenay	6.4 h	67%
Thunder Bay	6.4 h	70%
Winnipeg	6.1 h	60%
Kelowna	6.1 h	67%
Lethbridge	6.1 h	60%
Regina	5.9 h	63%

Darkness and moon, every night

Saint-Jérôme, June 2027: each night from local noon to the next noon
Night	Civil	Astronomical	Moon-free dark	Moon-free, 10 PM to 2 AM	Moon lit
Tue Jun 1	7 h 9 min	3 h 17 min	5 h 50 min	4 h	9%
Wed Jun 2	7 h 7 min	3 h 13 min	6 h 22 min	4 h	4%
Thu Jun 3	7 h 6 min	3 h 10 min	7 h 5 min	4 h	1%
Fri Jun 4	7 h 4 min	3 h 7 min	7 h 4 min	4 h	0%
Sat Jun 5	7 h 3 min	3 h 4 min	6 h 14 min	3 h 48 min	3%
Sun Jun 6	7 h 2 min	3 h 1 min	5 h 24 min	2 h 58 min	8%
Mon Jun 7	7 h	2 h 58 min	4 h 45 min	2 h 20 min	16%
Tue Jun 8	6 h 59 min	2 h 55 min	4 h 16 min	1 h 51 min	25%
Wed Jun 9	6 h 58 min	2 h 53 min	3 h 52 min	1 h 27 min	36%
Thu Jun 10	6 h 57 min	2 h 50 min	3 h 31 min	1 h 6 min	47%
Fri Jun 11	6 h 56 min	2 h 48 min	3 h 11 min	47 min	58%
Sat Jun 12	6 h 56 min	2 h 46 min	2 h 51 min	27 min	68%
Sun Jun 13	6 h 55 min	2 h 44 min	2 h 29 min	6 min	78%
Mon Jun 14	6 h 54 min	2 h 43 min	2 h 5 min	0 min	86%
Tue Jun 15	6 h 54 min	2 h 42 min	1 h 35 min	0 min	92%
Wed Jun 16	6 h 53 min	2 h 40 min	57 min	0 min	97%
Thu Jun 17	6 h 53 min	2 h 40 min	12 min	0 min	99%
Fri Jun 18	6 h 53 min	2 h 39 min	0 min	0 min	100%
Sat Jun 19	6 h 52 min	2 h 38 min	20 min	0 min	99%
Sun Jun 20	6 h 52 min	2 h 38 min	54 min	25 min	96%
Mon Jun 21	6 h 52 min	2 h 38 min	1 h 21 min	53 min	91%
Tue Jun 22	6 h 52 min	2 h 39 min	1 h 44 min	1 h 16 min	85%
Wed Jun 23	6 h 53 min	2 h 39 min	2 h 3 min	1 h 35 min	78%
Thu Jun 24	6 h 53 min	2 h 40 min	2 h 20 min	1 h 52 min	70%
Fri Jun 25	6 h 53 min	2 h 41 min	2 h 37 min	2 h 9 min	60%
Sat Jun 26	6 h 54 min	2 h 42 min	2 h 54 min	2 h 26 min	51%
Sun Jun 27	6 h 54 min	2 h 43 min	3 h 13 min	2 h 45 min	40%
Mon Jun 28	6 h 55 min	2 h 45 min	3 h 36 min	3 h 8 min	30%
Tue Jun 29	6 h 56 min	2 h 47 min	4 h 5 min	3 h 37 min	21%
Wed Jun 30	6 h 57 min	2 h 49 min	4 h 43 min	4 h	12%

Moon lit: SunCalc illuminated fraction at the middle of the 10 PM to 2 AM window.

Questions

Can you see the northern lights in Saint-Jérôme in June?: On dark, clear nights with enough activity. 30 of 30 nights at Saint-Jérôme have civil darkness, and 3% of past June days reached Kp 6.
How dark is Saint-Jérôme in June?: Saint-Jérôme averages 6.9 hours of civil night a night in June 2027, from 7 h 9 min on the 1st to 6 h 57 min on the last night.
How cloudy is Saint-Jérôme in June?: NASA POWER's 2001 to 2020 climatology gives Saint-Jérôme's 1 degree cell 61% mean cloud in June, against 64% for the whole year. It is an all-hours average, not a forecast.
What is the best night in June 2027 for aurora in Saint-Jérôme?: By darkness and moon alone, Jun 1, with 4 h of moon-free darkness inside 10 PM to 2 AM at Saint-Jérôme. Activity on that date will only be known hours ahead.
Is June or July better in Saint-Jérôme?: By civil night times the clear share, June scores 2.7 hours at Saint-Jérôme and July 3.2. July comes out ahead.

Sources and verification

SunCalchttps://github.com/mourner/suncalc
NASA POWER climatologyhttps://power.larc.nasa.gov/docs/services/api/temporal/climatology/
GFZ Potsdam Kp indexhttps://kp.gfz.de/en/data
NOAA SWPC, Tips on viewing the aurorahttps://www.spaceweather.gov/content/tips-viewing-aurora

Quoted figures last checked against their sources on 2026-09-30; next review 2026-12-31. Computed figures come from SunCalc and the IGRF-14 dipole as described in the methodology. Every quote is listed in the sources ledger.