Can you see the northern lights in Rosemont-La Petite-Patrie in March?

On dark, clear nights with enough activity. 31 of 31 nights at Rosemont-La Petite-Patrie have civil darkness, and 3% of past March days reached Kp 6.

How dark is Rosemont-La Petite-Patrie in March?

Rosemont-La Petite-Patrie averages 11.0 hours of civil night a night in March 2027, from 11 h 45 min on the 1st to 10 h 8 min on the last night.

How cloudy is Rosemont-La Petite-Patrie in March?

NASA POWER's 2001 to 2020 climatology gives Rosemont-La Petite-Patrie's 1 degree cell 65% mean cloud in March, against 65% for the whole year. It is an all-hours average, not a forecast.

What is the best night in March 2027 for aurora in Rosemont-La Petite-Patrie?

By darkness and moon alone, Mar 1, with 4 h of moon-free darkness inside 10 PM to 2 AM at Rosemont-La Petite-Patrie. Activity on that date will only be known hours ahead.

Rosemont-La Petite-Patrie · March 2027

Northern lights in Rosemont-La Petite-Patrie in March 2027

Answer

March gives Rosemont-La Petite-Patrie 11.0 hours of civil night on the 15th, the 6th darkest of its 12 months, under 65% mean cloud. 3% of March days since 1996 reached Kp 6, enough for the oval edge to reach Rosemont-La Petite-Patrie.

11.0 h

civil night, average night

SunCalc for 45.54, -73.61; NASA POWER; GFZ Kp

March against the rest of the year

4.2

4.0

3.8

3.1

2.7

2.6

3.1

3.7

4.8

3.8

3.4

March cloud at Rosemont-La Petite-Patrie averages 65% in NASA POWER's 2001 to 2020 record, close to its yearly mean of 65%. September is Rosemont-La Petite-Patrie's clearest month at 54%. By civil night times clear sky, March scores 3.8 hours at Rosemont-La Petite-Patrie, 4th of 12. Trois-Rivières, 122 km away, averages 62%, clearer by 3 points.

Civil night at Rosemont-La Petite-Patrie starts March at 11 h 45 min and reaches 10 h 8 min by March 31, 1.6 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 8.7 hours on the 15th.

March night by night

March opens toward a new moon on Mar 8, with full moon on Mar 22, in America/Toronto dates. Rosemont-La Petite-Patrie gets 187 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: Mar 1 (4 h), Mar 2 (4 h), Mar 3 (4 h).

1
32% lit
9.5 h
2
23% lit
10.2 h
3
16% lit
10.6 h
4
9% lit
11.0 h
5
5% lit
11.4 h
6
1% lit
11.5 h
7
0% lit
11.4 h
8
1% lit
11.3 h
New
9
4% lit
10.2 h
10
8% lit
8.9 h
11
15% lit
7.7 h
12
24% lit
6.4 h
13
34% lit
5.1 h
14
44% lit
3.9 h
15
56% lit
2.9 h
16
67% lit
2.1 h
17
77% lit
1.4 h
18
86% lit
0.9 h
19
93% lit
0.5 h
20
98% lit
0.1 h
21
100% lit
0.0 h
22
99% lit
0.2 h
Full
23
96% lit
1.4 h
24
91% lit
2.7 h
25
84% lit
3.9 h
26
76% lit
5.0 h
27
68% lit
6.0 h
28
58% lit
6.8 h
29
49% lit
7.5 h
30
40% lit
8.0 h
31
31% lit
8.5 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 Marchs

Rosemont-La Petite-Patrie needs Kp 6 for the average oval edge to sit overhead. 30 of the 930 March days from 1996 to 2025 (3%) reached it in the GFZ Potsdam record, 6th of 12 months; storm days with Kp 5 or more made up 12%. Rosemont-La Petite-Patrie sits at 54.7 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.

March across Canada

No month-page town in Canada has more civil night on March 15 than Rosemont-La Petite-Patrie; the national median is 10.9 hours. Coming from February (12.4 hours at Rosemont-La Petite-Patrie), March loses darkness, and April brings shorter nights (9.3 hours on the 15th). The March equinox falls on March 20, 16:25 Rosemont-La Petite-Patrie time, inside the weeks SWPC links with larger storms.

Civil night on March 15 and March cloud, month-page towns in Canada
Town	Civil night	Cloud
Rosemont-La Petite-Patrie	11.0 h	65%
Québec	11.0 h	63%
Greater Sudbury	11.0 h	60%
Saguenay	11.0 h	66%
Trois-Rivières	11.0 h	62%
St. John's	11.0 h	80%
Thunder Bay	11.0 h	67%
Sydney	11.0 h	77%
Calgary	10.9 h	72%
Edmonton	10.9 h	72%
Winnipeg	10.9 h	61%
Saskatoon	10.9 h	68%

Darkness and moon, every night

Rosemont-La Petite-Patrie, March 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
Mon Mar 1	11 h 45 min	9 h 28 min	9 h 32 min	4 h	32%
Tue Mar 2	11 h 42 min	9 h 25 min	10 h 9 min	4 h	23%
Wed Mar 3	11 h 39 min	9 h 21 min	10 h 38 min	4 h	16%
Thu Mar 4	11 h 36 min	9 h 18 min	11 h 2 min	4 h	9%
Fri Mar 5	11 h 33 min	9 h 15 min	11 h 22 min	4 h	5%
Sat Mar 6	11 h 30 min	9 h 12 min	11 h 30 min	4 h	1%
Sun Mar 7	11 h 26 min	9 h 8 min	11 h 26 min	4 h	0%
Mon Mar 8	11 h 23 min	9 h 5 min	11 h 21 min	4 h	1%
Tue Mar 9	11 h 20 min	9 h 2 min	10 h 10 min	4 h	4%
Wed Mar 10	11 h 17 min	8 h 58 min	8 h 57 min	4 h	8%
Thu Mar 11	11 h 14 min	8 h 55 min	7 h 41 min	4 h	15%
Fri Mar 12	11 h 10 min	8 h 52 min	6 h 24 min	2 h 45 min	24%
Sat Mar 13	11 h 7 min	8 h 48 min	5 h 7 min	30 min	34%
Sun Mar 14	11 h 4 min	8 h 45 min	3 h 56 min	0 min	44%
Mon Mar 15	11 h 1 min	8 h 41 min	2 h 54 min	0 min	56%
Tue Mar 16	10 h 57 min	8 h 38 min	2 h 5 min	0 min	67%
Wed Mar 17	10 h 54 min	8 h 34 min	1 h 26 min	0 min	77%
Thu Mar 18	10 h 51 min	8 h 30 min	55 min	0 min	86%
Fri Mar 19	10 h 48 min	8 h 27 min	29 min	0 min	93%
Sat Mar 20	10 h 44 min	8 h 23 min	6 min	0 min	98%
Sun Mar 21	10 h 41 min	8 h 20 min	0 min	0 min	100%
Mon Mar 22	10 h 38 min	8 h 16 min	12 min	0 min	99%
Tue Mar 23	10 h 35 min	8 h 12 min	1 h 27 min	0 min	96%
Wed Mar 24	10 h 31 min	8 h 9 min	2 h 40 min	25 min	91%
Thu Mar 25	10 h 28 min	8 h 5 min	3 h 52 min	1 h 38 min	84%
Fri Mar 26	10 h 25 min	8 h 1 min	4 h 59 min	2 h 46 min	76%
Sat Mar 27	10 h 22 min	7 h 57 min	5 h 59 min	3 h 47 min	68%
Sun Mar 28	10 h 18 min	7 h 54 min	6 h 49 min	4 h	58%
Mon Mar 29	10 h 15 min	7 h 50 min	7 h 30 min	4 h	49%
Tue Mar 30	10 h 12 min	7 h 46 min	8 h 2 min	4 h	40%
Wed Mar 31	10 h 8 min	7 h 42 min	8 h 28 min	4 h	31%

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

Questions

Can you see the northern lights in Rosemont-La Petite-Patrie in March?: On dark, clear nights with enough activity. 31 of 31 nights at Rosemont-La Petite-Patrie have civil darkness, and 3% of past March days reached Kp 6.
How dark is Rosemont-La Petite-Patrie in March?: Rosemont-La Petite-Patrie averages 11.0 hours of civil night a night in March 2027, from 11 h 45 min on the 1st to 10 h 8 min on the last night.
How cloudy is Rosemont-La Petite-Patrie in March?: NASA POWER's 2001 to 2020 climatology gives Rosemont-La Petite-Patrie's 1 degree cell 65% mean cloud in March, against 65% for the whole year. It is an all-hours average, not a forecast.
What is the best night in March 2027 for aurora in Rosemont-La Petite-Patrie?: By darkness and moon alone, Mar 1, with 4 h of moon-free darkness inside 10 PM to 2 AM at Rosemont-La Petite-Patrie. Activity on that date will only be known hours ahead.
Is March or April better in Rosemont-La Petite-Patrie?: By civil night times the clear share, March scores 3.8 hours at Rosemont-La Petite-Patrie and April 3.1. March 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.