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Valley East · March 2027

Northern lights in Valley East in March 2027

Answer

March gives Valley East 11.0 hours of civil night on the 15th, the 6th darkest of its 12 months, under 60% mean cloud. 3% of March days since 1996 reached Kp 6, enough for the oval edge to reach Valley East.
10.9 h
civil night, average night
SunCalc for 46.65, -81.00; NASA POWER; GFZ Kp

March against the rest of the year

March cloud at Valley East averages 60% in NASA POWER's 2001 to 2020 record, 5 points clearer than its yearly mean. July is Valley East's clearest month at 54%. That makes March the best month of Valley East's year by civil night times clear sky, 4.4 hours. Greater Sudbury, 17 km away, averages the same 60%.

Civil night at Valley East starts March at 11 h 46 min and reaches 10 h 5 min by March 31, 1.7 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 8.6 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. Valley East 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. 1

    32% lit

    9.7 h

  2. 2

    23% lit

    10.3 h

  3. 3

    16% lit

    10.7 h

  4. 4

    9% lit

    11.1 h

  5. 5

    5% lit

    11.4 h

  6. 6

    1% lit

    11.5 h

  7. 7

    0% lit

    11.4 h

  8. 8

    1% lit

    11.3 h

  9. 9

    4% lit

    10.1 h

  10. 10

    8% lit

    8.9 h

  11. 11

    15% lit

    7.6 h

  12. 12

    24% lit

    6.3 h

  13. 13

    34% lit

    5.0 h

  14. 14

    44% lit

    3.8 h

  15. 15

    56% lit

    2.8 h

  16. 16

    67% lit

    2.0 h

  17. 17

    77% lit

    1.4 h

  18. 18

    86% lit

    0.8 h

  19. 19

    93% lit

    0.4 h

  20. 20

    98% lit

    0.1 h

  21. 21

    100% lit

    0.0 h

  22. 22

    99% lit

    0.2 h

  23. 23

    96% lit

    1.5 h

  24. 24

    91% lit

    2.7 h

  25. 25

    84% lit

    4.0 h

  26. 26

    76% lit

    5.1 h

  27. 27

    68% lit

    6.1 h

  28. 28

    58% lit

    6.9 h

  29. 29

    49% lit

    7.6 h

  30. 30

    40% lit

    8.1 h

  31. 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

Valley East 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%. Valley East sits at 55.7 degrees geomagnetic. By SWPC's rule the average oval edge is overhead at Kp 6, and aurora is usually visible on the northern horizon at G1 (Kp 5) or less.

March across Canada

No month-page town in Canada has more civil night on March 15 than Valley East; the national median is 10.9 hours. Coming from February (12.5 hours at Valley East), March loses darkness, and April brings shorter nights (9.2 hours on the 15th). The March equinox falls on March 20, 16:25 Valley East time, inside the weeks SWPC links with larger storms.

Civil night on March 15 and March cloud, month-page towns in Canada
TownCivil nightCloud
Valley East11.0 h60%
Québec11.0 h63%
Greater Sudbury11.0 h60%
Saguenay11.0 h66%
Trois-Rivières11.0 h62%
St. John's11.0 h80%
Thunder Bay11.0 h67%
Sydney11.0 h77%
Calgary10.9 h72%
Edmonton10.9 h72%
Winnipeg10.9 h61%
Saskatoon10.9 h68%

Darkness and moon, every night

Valley East, March 2027: each night from local noon to the next noon
NightCivilAstronomicalMoon-free darkMoon-free, 10 PM to 2 AMMoon lit
Mon Mar 111 h 46 min9 h 26 min9 h 40 min4 h32%
Tue Mar 211 h 43 min9 h 22 min10 h 15 min4 h23%
Wed Mar 311 h 39 min9 h 19 min10 h 44 min4 h16%
Thu Mar 411 h 36 min9 h 16 min11 h 6 min4 h9%
Fri Mar 511 h 33 min9 h 12 min11 h 24 min4 h5%
Sat Mar 611 h 30 min9 h 9 min11 h 30 min4 h1%
Sun Mar 711 h 26 min9 h 5 min11 h 26 min4 h0%
Mon Mar 811 h 23 min9 h 2 min11 h 19 min4 h1%
Tue Mar 911 h 20 min8 h 59 min10 h 7 min4 h4%
Wed Mar 1011 h 16 min8 h 55 min8 h 53 min4 h8%
Thu Mar 1111 h 13 min8 h 51 min7 h 36 min3 h 26 min15%
Fri Mar 1211 h 10 min8 h 48 min6 h 17 min2 h 9 min24%
Sat Mar 1311 h 6 min8 h 44 min5 h0 min34%
Sun Mar 1411 h 3 min8 h 41 min3 h 48 min0 min44%
Mon Mar 1511 h8 h 37 min2 h 47 min0 min56%
Tue Mar 1610 h 56 min8 h 33 min1 h 58 min0 min67%
Wed Mar 1710 h 53 min8 h 30 min1 h 21 min0 min77%
Thu Mar 1810 h 50 min8 h 26 min51 min0 min86%
Fri Mar 1910 h 46 min8 h 22 min26 min0 min93%
Sat Mar 2010 h 43 min8 h 18 min4 min0 min98%
Sun Mar 2110 h 39 min8 h 15 min0 min0 min100%
Mon Mar 2210 h 36 min8 h 11 min14 min0 min99%
Tue Mar 2310 h 33 min8 h 7 min1 h 30 min0 min96%
Wed Mar 2410 h 29 min8 h 3 min2 h 44 min59 min91%
Thu Mar 2510 h 26 min7 h 59 min3 h 57 min2 h 13 min84%
Fri Mar 2610 h 22 min7 h 55 min5 h 5 min3 h 23 min76%
Sat Mar 2710 h 19 min7 h 51 min6 h 5 min4 h68%
Sun Mar 2810 h 16 min7 h 47 min6 h 55 min4 h58%
Mon Mar 2910 h 12 min7 h 43 min7 h 35 min4 h49%
Tue Mar 3010 h 9 min7 h 39 min8 h 6 min4 h40%
Wed Mar 3110 h 5 min7 h 35 min8 h 30 min4 h31%
Moon lit: SunCalc illuminated fraction at the middle of the 10 PM to 2 AM window.

Questions

Can you see the northern lights in Valley East in March?
On dark, clear nights with enough activity. 31 of 31 nights at Valley East have civil darkness, and 3% of past March days reached Kp 6.
How dark is Valley East in March?
Valley East averages 10.9 hours of civil night a night in March 2027, from 11 h 46 min on the 1st to 10 h 5 min on the last night.
How cloudy is Valley East in March?
NASA POWER's 2001 to 2020 climatology gives Valley East's 1 degree cell 60% 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 Valley East?
By darkness and moon alone, Mar 1, with 4 h of moon-free darkness inside 10 PM to 2 AM at Valley East. Activity on that date will only be known hours ahead.
Is March or April better in Valley East?
By civil night times the clear share, March scores 4.4 hours at Valley East and April 3.3. March comes out ahead.

Sources and verification

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.