Original recording Cashbox magazine gave
letter grades to both sides of the single in its review. "When Sunny Gets Blue" received a B+ (meaning excellent): "Johnny Mathis, a talented youngster with a wistful, romantic, voice, lends his beautiful technique to this tender love story and comes up with a most pleasant side. Pretty performance."
Cover versions On December 28, 1956,
Nat King Cole recorded it for his album
Love Is the Thing, with this rendition praised by music critic
Will Friedwald as displaying Cole's "tenderness, compassion and empathy".
Stanley Green of
Stereo Review commended
Nancy Wilson's rendition on her 1962 album
Hello Young Lovers. Various versions of "When Sunny Gets Blue" have been singled out by the editors of
Billboard in reviews of singles or the albums on which the song appeared. The
George Shearing Trio's version on their 1962 album
Jazz Moments was described as "richly harmonized".
Jeanne Lee and
Ran Blake's recording was described as one of "the better tracks" from their 1962 album
The Newest Sound Around. Regarding
Joe Harnell's version, released as a single in 1965, they wrote, "First-rate piano work and bossa nova-flavored arrangement of the standard." In their review of
Steve Miller's 1988 album
Born 2 B Blue, they described his rendition as "smooth".
Lillian Boutté's recording from her 1996 album
But… Beautiful was "enjoyable".
Michele Rosewoman's version on her 1996 album
Spirit was described as a "playfully progressive reconstitution".
Cashbox also highlighted recordings of "When Sunny Gets Blue" in various reviews. Regarding
Blossom Dearie's version on her 1964 album
May I Come In?, the editors singled it out as one of the songs on which her "high-pitched jazz-styled bluesy voice has lost none of its distinctive luster". As the
B-side of
Carmen McRae's 1964
single "Cutie Pants", "When Sunny Gets Blue" received a B+ (Very Good) with the comment, "Potent blues reading for late night spinners." Reviewing
Gene Shaw's 1964 album
Debut in Blue, they wrote, "Jazzophiles will dig these ultra-modern sounds, especially… 'When Sunny Gets Blue'." In their review of
Junior Mance's 1967 album
The Good Life, they described the song as "groovy". Regarding
Eddie "Lockjaw" Davis's 1968 album
Love Calls, they wrote, "Smooth and mellow sax treatments of tunes like 'When Sunny Gets Blue' [and others] make for an easy going package of 'mood music' particularly suited to those moods befalling couples late at night." When
Kenny Rankin's 1977 recording was released as a single, they wrote, "Considering the high-pitched, reedy quality of both their singing voices, a song that was performed by Johnny Mathis is an appropriate choice for Kenny Rankin. With lush orchestration by
Don Costa, Rankin's vocal skips along in jazzy intervals."
AllMusic critics have commented in retrospective reviews on various versions of the song.
Scott Yanow critiqued the
June Christy album
Fair and Warmer!, which was recorded in January 1957, and noted that "When Sunny Gets Blue" was one of the highlights. Regarding
Dakota Staton's version on her 1958 album
Dynamic!, Yanow wrote that she "puts plenty of feeling into" the song. Stephen Cook found
Jimmy Heath's rendition to be an "attractive cover" on 1961's
The Quota. He also reviewed the 1966 album
This Is Criss!, writing that
Sonny Criss "makes fine work of such rare-bird covers as… 'When Sunny Gets Blue'." Regarding
Anita O'Day's 1961 album
Waiter, Make Mine Blues, Jason Ankeny felt that "songs like… 'When Sunny Gets Blue' capture O'Day at her most affecting, balancing her trademark sophistication with the world-weary resignation of one who has loved and lost." John Bush reviewed
Sarah Vaughan's 1962 album
Sarah + 2, commenting, "Her best feature is 'When Sunny Gets Blue,' a spotlight for her dynamic range." Yanow noted the song as a highlight on the
George Shearing Trio's 1963 album
Jazz Moments. Regarding the
McCoy Tyner version on 1964's
Today and Tomorrow, Michael G. Nastos wrote that "the chiming, wanton ballad 'When Sunny Gets Blue' drips with all the pure emotion that Tyner can wring out of a weepy piano." In a review of
Matt Monro's 1967 album ''Here's to My Lady'', Ankeny wrote, "Monro's vocals are smooth and rich like crushed velvet, tackling standards like… 'When Sunny Gets Blue'… with a thoughtfulness that comes only with age and experience." Regarding the
Dexter Gordon Quartet's 1975 album
Something Different, Yanow wrote, "Gordon stretches out on some standards, making a classic statement on the ballad 'When Sunny Gets Blue'." Yanow also mentioned the song as a highlight on
Chris Connor's 1978 album
Sweet and Swinging. AllMusic critics have also commented on the song in contemporary reviews. In his review of the
Paolo Fresu Quintet's 1991 album
Ballads, Thom Jurek commented, "Beginning a ballad program with the quietly gorgeous 'When Sunny Gets Blue' is auspicious, especially when the opening measures feature a Fresu solo of such lyrical warmth and relaxed phrasing that the listener is nearly lulled into intoxication before [tenor saxophonist Tino] Tracana adds some weight in his own
Cannonball Adderley way." Yanow wrote of
Joe Williams's 1992 album
Ballad and Blues Master that the singer "was in superior form for this live date, putting a lot of feeling into such songs as… 'When Sunny Gets Blue'." Yanow also commented on Boutté's 1996
But… Beautiful album, singling out the song as one of its highlights. Jonathan Widran described the version on
Brandon Fields's 1999 album
Fields and Strings as "a soulful, sentimental take". James Manheim felt the song "takes naturally to orchestral pop treatment" on the 2025 album
Symphonic Steps by
Livingston Taylor and the
BBC Concert Orchestra. ==Legal case==