Is Macapá sunnier than Cayenne?

Macapá is the sunnier: about 2,203 hours of sunshine a year versus 2,049 — a difference of 154 hours.

Which is warmer, Macapá or Cayenne?

Macapá is warmer across the year: average daytime highs of 31°C (88°F) versus 28°C.

Which is better in winter (November–February), Macapá or Cayenne?

They are close in the November–February window: Macapá averages 63/100 (about 32°C days), Cayenne 65/100 (about 28°C).

Which has the warmer sea, Macapá or Cayenne?

Both peak at about 31°C (88°F); month-by-month sea temperatures for both are on this page.

Macapá vs Cayenne: which is sunnier?

🇧🇷 Brazil vs 🇬🇫 French Guiana · 549 km apart · long-term climate normals (NASA POWER, 2001–2020)

Macapá is the sunnier overall: about 2,203 hours of sunshine a year to Cayenne's 2,049. Cayenne has the higher Sunshine Score in 3 of 12 months, Macapá in 2 (7 within 2 points).

Scores are the 0–100 Sunshine Score — sunshine, daytime warmth and dryness in one number, per month.

At a glance

	Macapá	Cayenne
Sunshine hours / year	2,203	2,049
Sunniest month	August (78/100)	September (81/100)
Nov–Feb average score	63/100	65/100
Jun–Aug average score	69/100	66/100
Rain / year	1,986 mm	2,872 mm
Warmest sea	31°C / 88°F	31°C / 88°F
Peak midday UV	11 (extreme)	12 (extreme)

Macapá vs Cayenne month by month

Month	Sunshine Score		Day high °C		Rain mm		Sea °C
Month	Macapá	Cayenne	Macapá	Cayenne	Macapá	Cayenne	Macapá	Cayenne
January	64	63	30°	27°	201	300	30°	29°
February	64	63	29°	27°	286	264	30°	29°
March	64	63	29°	28°	283	250	30°	30°
April	64	63	29°	28°	299	369	30°	30°
May	64	63	29°	28°	251	504	30°	29°
June	64	63	29°	28°	187	334	30°	30°
July	64	63	29°	28°	151	217	30°	30°
August	78	71	30°	28°	72	109	31°	31°
September	76	81	33°	29°	38	54	30°	31°
October	68	80	34°	30°	38	58	30°	31°
November	58	71	35°	29°	45	110	30°	30°
December	67	63	32°	28°	135	303	30°	29°

The sunnier month by month: Jan even · Feb even · Mar even · Apr even · May even · Jun even · Jul even · Aug Macapá · Sep Cayenne · Oct Cayenne · Nov Cayenne · Dec Macapá.

When to pick which

November–February: too close to call — Macapá averages 63/100, Cayenne 65/100. Macapá is the warmer, around 32°C daytime highs vs 28°C. See the winter sun ranking.
March–May: too close to call — Macapá averages 64/100, Cayenne 63/100. Daytime highs are similar (29°C vs 28°C).
June–August: Macapá (average score 69/100 vs 66). Daytime highs are similar (29°C vs 28°C).
September–October: Cayenne (average score 81/100 vs 72). Macapá is the warmer, around 34°C daytime highs vs 30°C.

Sea temperature

Both seas peak at 31°C / 88°F. Swimmable water (21°C+): Macapá all year, Cayenne all year. Month-by-month sea temperatures are in the table above.

Full month-by-month guides: Macapá weather by month · Cayenne weather by month · Best time to visit Brazil.

More comparisons: Macapá vs Belém · Macapá vs Santarém · Cayenne vs Belém · Cayenne vs Georgetown · all head-to-heads