Sunspot Numbers by Solar Cycle (1755–2026)

Monthly sunspot numbers (SSN) across 25 solar cycles, with cycle number and months into each cycle.
# year
month
sunspot_number_monthly_mean
cycle
months_into_cycle
1 1755 2 18.7 1 0
2 1755 3 11.3 1 1
3 1755 4 10.8 1 2
4 1755 5 0.0 1 3
5 1755 6 0.0 1 4
6 1755 7 14.3 1 5
7 1755 8 5.3 1 6
8 1755 9 29.7 1 7
9 1755 10 39.5 1 8
10 1755 11 11.3 1 9
11 1755 12 33.3 1 10
12 1756 1 20.8 1 11
13 1756 2 11.8 1 12
14 1756 3 9.0 1 13
15 1756 4 15.7 1 14
16 1756 5 20.8 1 15
17 1756 6 21.5 1 16
18 1756 7 6.0 1 17
19 1756 8 10.7 1 18
20 1756 9 19.7 1 19
21 1756 10 23.8 1 20
22 1756 11 28.3 1 21
23 1756 12 15.7 1 22
24 1757 1 23.5 1 23
25 1757 2 35.3 1 24
26 1757 3 43.7 1 25
27 1757 4 50.0 1 26
28 1757 5 63.5 1 27
29 1757 6 21.3 1 28
30 1757 7 41.7 1 29
31 1757 8 85.5 1 30
32 1757 9 66.2 1 31
33 1757 10 54.2 1 32
34 1757 11 107.8 1 33
35 1757 12 55.8 1 34
36 1758 1 62.7 1 35
37 1758 2 86.7 1 36
38 1758 3 81.7 1 37
39 1758 4 120.5 1 38
40 1758 5 77.3 1 39
41 1758 6 75.0 1 40
42 1758 7 73.3 1 41
43 1758 8 64.5 1 42
44 1758 9 104.2 1 43
45 1758 10 62.8 1 44
46 1758 11 71.7 1 45
47 1758 12 71.7 1 46
48 1759 1 80.5 1 47
49 1759 2 73.3 1 48
50 1759 3 78.0 1 49
51 1759 4 78.3 1 50
52 1759 5 81.7 1 51
53 1759 6 83.3 1 52
54 1759 7 85.0 1 53
55 1759 8 118.8 1 54
56 1759 9 128.7 1 55
57 1759 10 99.5 1 56
58 1759 11 77.2 1 57
59 1759 12 95.0 1 58
60 1760 1 112.2 1 59
61 1760 2 99.2 1 60
62 1760 3 124.5 1 61
63 1760 4 97.2 1 62
64 1760 5 120.0 1 63
65 1760 6 80.5 1 64
66 1760 7 110.0 1 65
67 1760 8 126.0 1 66
68 1760 9 102.2 1 67
69 1760 10 84.3 1 68
70 1760 11 99.5 1 69
71 1760 12 101.7 1 70
72 1761 1 116.7 1 71
73 1761 2 151.7 1 72
74 1761 3 134.5 1 73
75 1761 4 119.5 1 74
76 1761 5 178.7 1 75
77 1761 6 165.5 1 76
78 1761 7 156.8 1 77
79 1761 8 151.8 1 78
80 1761 9 167.8 1 79
81 1761 10 147.8 1 80
82 1761 11 149.5 1 81
83 1761 12 76.7 1 82
84 1762 1 73.0 1 83
85 1762 2 121.3 1 84
86 1762 3 76.2 1 85
87 1762 4 100.3 1 86
88 1762 5 66.5 1 87
89 1762 6 128.5 1 88
90 1762 7 56.3 1 89
91 1762 8 112.8 1 90
92 1762 9 114.2 1 91
93 1762 10 115.5 1 92
94 1762 11 129.7 1 93
95 1762 12 128.7 1 94
96 1763 1 94.2 1 95
97 1763 2 53.2 1 96
98 1763 3 57.0 1 97
99 1763 4 54.8 1 98
100 1763 5 54.5 1 99
101 1763 6 59.7 1 100
102 1763 7 90.3 1 101
103 1763 8 44.2 1 102
104 1763 9 113.5 1 103
105 1763 10 77.2 1 104
106 1763 11 101.5 1 105
107 1763 12 102.3 1 106
108 1764 1 99.5 1 107
109 1764 2 99.5 1 108
110 1764 3 67.0 1 109
111 1764 4 57.3 1 110
112 1764 5 73.8 1 111
113 1764 6 50.0 1 112
114 1764 7 50.0 1 113
115 1764 8 50.0 1 114
116 1764 9 47.0 1 115
117 1764 10 46.7 1 116
118 1764 11 43.3 1 117
119 1764 12 42.8 1 118
120 1765 1 40.0 1 119
121 1765 2 43.3 1 120
122 1765 3 41.7 1 121
123 1765 4 36.7 1 122
124 1765 5 33.7 1 123
125 1765 6 33.3 1 124
126 1765 7 45.0 1 125
127 1765 8 49.5 1 126
128 1765 9 26.7 1 127
129 1765 10 23.3 1 128
130 1765 11 23.3 1 129
131 1765 12 21.7 1 130
132 1766 1 20.0 1 131
133 1766 2 18.3 1 132
134 1766 3 61.0 1 133
135 1766 4 10.0 1 134
136 1766 5 44.7 1 135
137 1766 6 5.0 2 0
138 1766 7 5.5 2 1
139 1766 8 6.7 2 2
140 1766 9 7.2 2 3
141 1766 10 8.3 2 4
142 1766 11 9.5 2 5
143 1766 12 32.0 2 6
144 1767 1 45.7 2 7
145 1767 2 50.0 2 8
146 1767 3 71.7 2 9
147 1767 4 54.8 2 10
148 1767 5 49.7 2 11
149 1767 6 55.5 2 12
150 1767 7 36.5 2 13
151 1767 8 68.0 2 14
152 1767 9 71.2 2 15
153 1767 10 73.5 2 16
154 1767 11 91.2 2 17
155 1767 12 88.8 2 18
156 1768 1 89.2 2 19
157 1768 2 110.2 2 20
158 1768 3 77.2 2 21
159 1768 4 71.2 2 22
160 1768 5 129.5 2 23
161 1768 6 129.0 2 24
162 1768 7 87.7 2 25
163 1768 8 111.3 2 26
164 1768 9 124.7 2 27
165 1768 10 129.7 2 28
166 1768 11 151.0 2 29
167 1768 12 186.3 2 30
168 1769 1 123.2 2 31
169 1769 2 107.0 2 32
170 1769 3 107.2 2 33
171 1769 4 161.2 2 34
172 1769 5 122.7 2 35
173 1769 6 157.3 2 36
174 1769 7 197.7 2 37
175 1769 8 200.5 2 38
176 1769 9 248.0 2 39
177 1769 10 263.7 2 40
178 1769 11 246.8 2 41
179 1769 12 186.7 2 42
180 1770 1 173.3 2 43
181 1770 2 237.5 2 44
182 1770 3 133.5 2 45
183 1770 4 85.0 2 46
184 1770 5 116.8 2 47
185 1770 6 138.8 2 48
186 1770 7 183.0 2 49
187 1770 8 210.5 2 50
188 1770 9 174.0 2 51
189 1770 10 172.7 2 52
190 1770 11 220.3 2 53
191 1770 12 170.5 2 54
192 1771 1 60.0 2 55
193 1771 2 77.0 2 56
194 1771 3 77.8 2 57
195 1771 4 108.2 2 58
196 1771 5 254.5 2 59
197 1771 6 199.2 2 60
198 1771 7 112.8 2 61
199 1771 8 97.5 2 62
200 1771 9 169.0 2 63
201 1771 10 150.0 2 64
202 1771 11 166.2 2 65
203 1771 12 159.5 2 66
204 1772 1 168.2 2 67
205 1772 2 151.3 2 68
206 1772 3 51.8 2 69
207 1772 4 153.7 2 70
208 1772 5 63.3 2 71
209 1772 6 95.0 2 72
210 1772 7 128.8 2 73
211 1772 8 93.7 2 74
212 1772 9 84.2 2 75
213 1772 10 131.0 2 76
214 1772 11 102.2 2 77
215 1772 12 106.7 2 78
216 1773 1 91.0 2 79
217 1773 2 48.3 2 80
218 1773 3 85.3 2 81
219 1773 4 54.8 2 82
220 1773 5 68.5 2 83
221 1773 6 47.3 2 84
222 1773 7 46.2 2 85
223 1773 8 21.2 2 86
224 1773 9 48.8 2 87
225 1773 10 43.8 2 88
226 1773 11 68.2 2 89
227 1773 12 72.0 2 90
228 1774 1 78.0 2 91
229 1774 2 109.0 2 92
230 1774 3 92.8 2 93
231 1774 4 73.0 2 94
232 1774 5 85.5 2 95
233 1774 6 47.5 2 96
234 1774 7 29.2 2 97
235 1774 8 11.0 2 98
236 1774 9 13.2 2 99
237 1774 10 23.3 2 100
238 1774 11 29.5 2 101
239 1774 12 20.3 2 102
240 1775 1 7.3 2 103
241 1775 2 0.0 2 104
242 1775 3 19.3 2 105
243 1775 4 18.7 2 106
244 1775 5 6.5 2 107
245 1775 6 20.5 3 0
246 1775 7 1.7 3 1
247 1775 8 13.2 3 2
248 1775 9 5.3 3 3
249 1775 10 9.3 3 4
250 1775 11 25.2 3 5
251 1775 12 13.2 3 6
252 1776 1 36.2 3 7
253 1776 2 19.3 3 8
254 1776 3 10.5 3 9
255 1776 4 36.3 3 10
256 1776 5 18.7 3 11
257 1776 6 31.7 3 12
258 1776 7 1.7 3 13
259 1776 8 40.3 3 14
260 1776 9 26.7 3 15
261 1776 10 50.0 3 16
262 1776 11 58.3 3 17
263 1776 12 66.7 3 18
264 1777 1 75.0 3 19
265 1777 2 60.8 3 20
266 1777 3 65.0 3 21
267 1777 4 159.2 3 22
268 1777 5 133.8 3 23
269 1777 6 134.5 3 24
270 1777 7 158.3 3 25
271 1777 8 186.7 3 26
272 1777 9 193.7 3 27
273 1777 10 177.5 3 28
274 1777 11 243.3 3 29
275 1777 12 262.2 3 30
276 1778 1 295.5 3 31
277 1778 2 182.2 3 32
278 1778 3 223.3 3 33
279 1778 4 241.7 3 34
280 1778 5 398.2 3 35
281 1778 6 286.0 3 36
282 1778 7 255.0 3 37
283 1778 8 233.3 3 38
284 1778 9 286.2 3 39
285 1778 10 260.5 3 40
286 1778 11 250.5 3 41
287 1778 12 175.0 3 42
288 1779 1 191.2 3 43
289 1779 2 276.2 3 44
290 1779 3 196.7 3 45
291 1779 4 241.7 3 46
292 1779 5 233.3 3 47
293 1779 6 189.5 3 48
294 1779 7 238.3 3 49
295 1779 8 186.7 3 50
296 1779 9 185.0 3 51
297 1779 10 206.7 3 52
298 1779 11 190.0 3 53
299 1779 12 183.3 3 54
300 1780 1 116.7 3 55
301 1780 2 163.3 3 56
302 1780 3 163.3 3 57
303 1780 4 158.3 3 58
304 1780 5 178.7 3 59
305 1780 6 146.7 3 60
306 1780 7 143.3 3 61
307 1780 8 143.3 3 62
308 1780 9 156.2 3 63
309 1780 10 128.3 3 64
310 1780 11 100.0 3 65
311 1780 12 97.8 3 66
312 1781 1 164.5 3 67
313 1781 2 124.5 3 68
314 1781 3 88.3 3 69
315 1781 4 113.8 3 70
316 1781 5 174.5 3 71
317 1781 6 162.8 3 72
318 1781 7 122.5 3 73
319 1781 8 110.0 3 74
320 1781 9 85.0 3 75
321 1781 10 45.5 3 76
322 1781 11 111.7 3 77
323 1781 12 58.7 3 78
324 1782 1 90.0 3 79
325 1782 2 62.5 3 80
326 1782 3 61.7 3 81
327 1782 4 68.3 3 82
328 1782 5 90.5 3 83
329 1782 6 63.3 3 84
330 1782 7 61.7 3 85
331 1782 8 73.3 3 86
332 1782 9 56.7 3 87
333 1782 10 38.7 3 88
334 1782 11 52.5 3 89
335 1782 12 50.0 3 90
336 1783 1 46.7 3 91
337 1783 2 64.5 3 92
338 1783 3 44.5 3 93
339 1783 4 47.2 3 94
340 1783 5 38.3 3 95
341 1783 6 42.0 3 96
342 1783 7 53.7 3 97
343 1783 8 33.3 3 98
344 1783 9 30.0 3 99
345 1783 10 13.3 3 100
346 1783 11 25.0 3 101
347 1783 12 17.5 3 102
348 1784 1 21.7 3 103
349 1784 2 13.3 3 104
350 1784 3 18.3 3 105
351 1784 4 16.7 3 106
352 1784 5 10.0 3 107
353 1784 6 15.0 3 108
354 1784 7 10.0 3 109
355 1784 8 16.7 3 110
356 1784 9 16.7 4 0
357 1784 10 13.3 4 1
358 1784 11 28.3 4 2
359 1784 12 23.3 4 3
360 1785 1 10.8 4 4
361 1785 2 13.3 4 5
362 1785 3 15.0 4 6
363 1785 4 26.2 4 7
364 1785 5 34.5 4 8
365 1785 6 43.8 4 9
366 1785 7 60.5 4 10
367 1785 8 33.3 4 11
368 1785 9 53.3 4 12
369 1785 10 78.7 4 13
370 1785 11 67.0 4 14
371 1785 12 45.5 4 15
372 1786 1 62.0 4 16
373 1786 2 79.3 4 17
374 1786 3 79.5 4 18
375 1786 4 142.3 4 19
376 1786 5 153.8 4 20
377 1786 6 98.3 4 21
378 1786 7 138.3 4 22
379 1786 8 149.5 4 23
380 1786 9 185.8 4 24
381 1786 10 187.2 4 25
382 1786 11 193.3 4 26
383 1786 12 187.8 4 27
384 1787 1 224.5 4 28
385 1787 2 176.7 4 29
386 1787 3 145.7 4 30
387 1787 4 212.0 4 31
388 1787 5 224.7 4 32
389 1787 6 165.3 4 33
390 1787 7 213.3 4 34
391 1787 8 228.7 4 35
392 1787 9 262.2 4 36
393 1787 10 261.7 4 37
394 1787 11 235.8 4 38
395 1787 12 290.0 4 39
396 1788 1 230.0 4 40
397 1788 2 215.3 4 41
398 1788 3 238.8 4 42
399 1788 4 180.8 4 43
400 1788 5 188.3 4 44
401 1788 6 257.0 4 45
402 1788 7 235.8 4 46
403 1788 8 226.7 4 47
404 1788 9 235.0 4 48
405 1788 10 236.7 4 49
406 1788 11 157.8 4 50
407 1788 12 215.8 4 51
408 1789 1 190.0 4 52
409 1789 2 208.8 4 53
410 1789 3 200.0 4 54
411 1789 4 205.5 4 55
412 1789 5 205.8 4 56
413 1789 6 200.0 4 57
414 1789 7 195.0 4 58
415 1789 8 171.7 4 59
416 1789 9 186.7 4 60
417 1789 10 149.5 4 61
418 1789 11 223.3 4 62
419 1789 12 225.8 4 63
420 1790 1 171.7 4 64
421 1790 2 212.5 4 65
422 1790 3 160.5 4 66
423 1790 4 156.7 4 67
424 1790 5 155.0 4 68
425 1790 6 151.7 4 69
426 1790 7 115.5 4 70
427 1790 8 145.0 4 71
428 1790 9 128.8 4 72
429 1790 10 140.5 4 73
430 1790 11 136.7 4 74
431 1790 12 123.3 4 75
432 1791 1 121.2 4 76
433 1791 2 103.3 4 77
434 1791 3 123.3 4 78
435 1791 4 128.7 4 79
436 1791 5 122.8 4 80
437 1791 6 107.0 4 81
438 1791 7 118.3 4 82
439 1791 8 71.7 4 83
440 1791 9 110.8 4 84
441 1791 10 102.8 4 85
442 1791 11 111.7 4 86
443 1791 12 110.0 4 87
444 1792 1 96.7 4 88
445 1792 2 106.7 4 89
446 1792 3 105.0 4 90
447 1792 4 126.2 4 91
448 1792 5 103.3 4 92
449 1792 6 101.7 4 93
450 1792 7 76.3 4 94
451 1792 8 100.0 4 95
452 1792 9 98.3 4 96
453 1792 10 98.3 4 97
454 1792 11 95.0 4 98
455 1792 12 93.3 4 99
456 1793 1 93.3 4 100
457 1793 2 91.7 4 101
458 1793 3 92.5 4 102
459 1793 4 88.3 4 103
460 1793 5 87.2 4 104
461 1793 6 85.0 4 105
462 1793 7 83.3 4 106
463 1793 8 48.8 4 107
464 1793 9 40.0 4 108
465 1793 10 78.3 4 109
466 1793 11 73.3 4 110
467 1793 12 76.2 4 111
468 1794 1 75.0 4 112
469 1794 2 73.3 4 113
470 1794 3 63.3 4 114
471 1794 4 47.3 4 115
472 1794 5 92.8 4 116
473 1794 6 69.2 4 117
474 1794 7 68.3 4 118
475 1794 8 66.7 4 119
476 1794 9 18.5 4 120
477 1794 10 47.5 4 121
478 1794 11 112.3 4 122
479 1794 12 85.7 4 123
480 1795 1 35.7 4 124
481 1795 2 66.5 4 125
482 1795 3 21.0 4 126
483 1795 4 31.0 4 127
484 1795 5 51.7 4 128
485 1795 6 28.5 4 129
486 1795 7 21.5 4 130
487 1795 8 42.8 4 131
488 1795 9 22.5 4 132
489 1795 10 32.5 4 133
490 1795 11 41.7 4 134
491 1795 12 30.0 4 135
492 1796 1 36.7 4 136
493 1796 2 39.7 4 137
494 1796 3 26.2 4 138
495 1796 4 52.8 4 139
496 1796 5 35.0 4 140
497 1796 6 11.2 4 141
498 1796 7 44.8 4 142
499 1796 8 2.5 4 143
500 1796 9 30.7 4 144
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Data Quality

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